If user uses HTTPClient instead of SessionClient then with --debug flag every debug log is logged twice.

Steps to reproduce:

1. Ensure HTTPClient will be initialized when using cinder command from command prompt.
2. Hit cinder list command with --debug flag

E.g.
cinder --debug list

Output:

REQ: curl -i http://172.31.21.78:5000/v2.0/tokens -X POST-H 'Content-Type: application/json'-H 'Accept: application/json'-H 'User-Agent: python-cinderclient' -d '{"auth": {"tenantName": "admin", "passwordCredentials": {"username": "admin", "password": "***"}}}'

DEBUG:cinderclient.client:
REQ: curl -i http://172.31.21.78:5000/v2.0/tokens -X POST-H 'Content-Type: application/json'-H 'Accept: application/json'-H 'User-Agent: python-cinderclient' -d '{"auth": {"tenantName": "admin", "passwordCredentials": {"username": "admin", "password": "***"}}}'

RESP: [200] {'Content-Length': '2805', 'Vary': 'X-Auth-Token', 'Keep-Alive': 'timeout=5, max=100', 'Server': 'Apache/2.4.7 (Ubuntu)', 'Connection': 'Keep-Alive', 'Date': 'Thu, 21 Apr 2016 05:57:25 GMT', 'Content-Type': 'application/json', 'x-openstack-request-id': 'req-a9206db4-ab16-47f6-9c1c-cf0d9907dde8'}
RESP BODY: {"access": {"token": {"issued_at": "2016-04-21T05:57:25.806768Z", "expires": "2016-04-21T06:57:25Z", "id": "440abd94bd3a402ea35ec1e3216c45bd", "tenant": {"description": "Bootstrap project for initializing the cloud.", "enabled": true, "id": "ebb78c2dea2d4e81920abb460345a11e", "name": "admin"}, "audit_ids": ["ZsyYSLIwR-KqFiVzeSEfDA"]}, "serviceCatalog": [{"endpoints": [{"adminURL": "http://172.31.21.78:8774/v2.1", "region": "RegionOne", "internalURL": "http://172.31.21.78:8774/v2.1", "id": "a17d22aebb58451facc13ef078692f4a", "publicURL": "http://172.31.21.78:8774/v2.1"}], "endpoints_links": [], "type": "compute", "name": "nova"}, {"endpoints": [{"adminURL": "http://172.31.21.78:9696/", "region": "RegionOne", "internalURL": "http://172.31.21.78:9696/", "id": "2223e30dbf044c1e967b10ff2dd5d40f", "publicURL": "http://172.31.21.78:9696/"}], "endpoints_links": [], "type": "network", "name": "neutron"}, {"endpoints": [{"adminURL": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e", "region": "RegionOne", "internalURL": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e", "id": "0d59353b55f04e08a95e47376276d9a5", "publicURL": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e"}], "endpoints_links": [], "type": "volumev2", "name": "cinderv2"}, {"endpoints": [{"adminURL": "http://172.31.21.78:9292", "region": "RegionOne", "internalURL": "http://172.31.21.78:9292", "id": "8ce33400e06041448f84d4fb9010e9b8", "publicURL": "http://172.31.21.78:9292"}], "endpoints_links": [], "type": "image", "name": "glance"}, {"endpoints": [{"adminURL": "http://172.31.21.78:8774/v2/ebb78c2dea2d4e81920abb460345a11e", "region": "RegionOne", "internalURL": "http://172.31.21.78:8774/v2/ebb78c2dea2d4e81920abb460345a11e", "id": "6335e0bf1b6f44909e6bc097c1ce2bf0", "publicURL": "http://172.31.21.78:8774/v2/ebb78c2dea2d4e81920abb460345a11e"}], "endpoints_links": [], "type": "compute_legacy", "name": "nova_legacy"}, {"endpoints": [{"adminURL": "http://172.31.21.78:8776/v1/ebb78c2dea2d4e81920abb460345a11e", "region": "RegionOne", "internalURL": "http://172.31.21.78:8776/v1/ebb78c2dea2d4e81920abb460345a11e", "id": "010be27ffd9041e58c2a75b785527d9d", "publicURL": "http://172.31.21.78:8776/v1/ebb78c2dea2d4e81920abb460345a11e"}], "endpoints_links": [], "type": "volume", "name": "cinder"}, {"endpoints": [{"adminURL": "http://172.31.21.78:35357", "region": "RegionOne", "internalURL": "http://172.31.21.78:5000", "id": "5f9904088ffa4d2ab950fd9ea2f5568b", "publicURL": "http://172.31.21.78:5000"}], "endpoints_links": [], "type": "identity", "name": "keystone"}], "user": {"username": "admin", "roles_links": [], "id": "caf7be7b99cf45aeb7809ce961837659", "roles": [{"name": "admin"}], "name": "admin"}, "metadata": {"is_admin": 0, "roles": ["09ae8fec1abf4d9c8c5b0bd4758411a4"]}}}

DEBUG:cinderclient.client:RESP: [200] {'Content-Length': '2805', 'Vary': 'X-Auth-Token', 'Keep-Alive': 'timeout=5, max=100', 'Server': 'Apache/2.4.7 (Ubuntu)', 'Connection': 'Keep-Alive', 'Date': 'Thu, 21 Apr 2016 05:57:25 GMT', 'Content-Type': 'application/json', 'x-openstack-request-id': 'req-a9206db4-ab16-47f6-9c1c-cf0d9907dde8'}
RESP BODY: {"access": {"token": {"issued_at": "2016-04-21T05:57:25.806768Z", "expires": "2016-04-21T06:57:25Z", "id": "440abd94bd3a402ea35ec1e3216c45bd", "tenant": {"description": "Bootstrap project for initializing the cloud.", "enabled": true, "id": "ebb78c2dea2d4e81920abb460345a11e", "name": "admin"}, "audit_ids": ["ZsyYSLIwR-KqFiVzeSEfDA"]}, "serviceCatalog": [{"endpoints": [{"adminURL": "http://172.31.21.78:8774/v2.1", "region": "RegionOne", "internalURL": "http://172.31.21.78:8774/v2.1", "id": "a17d22aebb58451facc13ef078692f4a", "publicURL": "http://172.31.21.78:8774/v2.1"}], "endpoints_links": [], "type": "compute", "name": "nova"}, {"endpoints": [{"adminURL": "http://172.31.21.78:9696/", "region": "RegionOne", "internalURL": "http://172.31.21.78:9696/", "id": "2223e30dbf044c1e967b10ff2dd5d40f", "publicURL": "http://172.31.21.78:9696/"}], "endpoints_links": [], "type": "network", "name": "neutron"}, {"endpoints": [{"adminURL": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e", "region": "RegionOne", "internalURL": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e", "id": "0d59353b55f04e08a95e47376276d9a5", "publicURL": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e"}], "endpoints_links": [], "type": "volumev2", "name": "cinderv2"}, {"endpoints": [{"adminURL": "http://172.31.21.78:9292", "region": "RegionOne", "internalURL": "http://172.31.21.78:9292", "id": "8ce33400e06041448f84d4fb9010e9b8", "publicURL": "http://172.31.21.78:9292"}], "endpoints_links": [], "type": "image", "name": "glance"}, {"endpoints": [{"adminURL": "http://172.31.21.78:8774/v2/ebb78c2dea2d4e81920abb460345a11e", "region": "RegionOne", "internalURL": "http://172.31.21.78:8774/v2/ebb78c2dea2d4e81920abb460345a11e", "id": "6335e0bf1b6f44909e6bc097c1ce2bf0", "publicURL": "http://172.31.21.78:8774/v2/ebb78c2dea2d4e81920abb460345a11e"}], "endpoints_links": [], "type": "compute_legacy", "name": "nova_legacy"}, {"endpoints": [{"adminURL": "http://172.31.21.78:8776/v1/ebb78c2dea2d4e81920abb460345a11e", "region": "RegionOne", "internalURL": "http://172.31.21.78:8776/v1/ebb78c2dea2d4e81920abb460345a11e", "id": "010be27ffd9041e58c2a75b785527d9d", "publicURL": "http://172.31.21.78:8776/v1/ebb78c2dea2d4e81920abb460345a11e"}], "endpoints_links": [], "type": "volume", "name": "cinder"}, {"endpoints": [{"adminURL": "http://172.31.21.78:35357", "region": "RegionOne", "internalURL": "http://172.31.21.78:5000", "id": "5f9904088ffa4d2ab950fd9ea2f5568b", "publicURL": "http://172.31.21.78:5000"}], "endpoints_links": [], "type": "identity", "name": "keystone"}], "user": {"username": "admin", "roles_links": [], "id": "caf7be7b99cf45aeb7809ce961837659", "roles": [{"name": "admin"}], "name": "admin"}, "metadata": {"is_admin": 0, "roles": ["09ae8fec1abf4d9c8c5b0bd4758411a4"]}}}


REQ: curl -i http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e/volumes/detail -X GET-H 'X-Auth-Project-Id: admin'-H 'User-Agent: python-cinderclient'-H 'Accept: application/json'-H 'X-Auth-Token: {SHA1}15e2f758dbdab55242242674c99308f5abb2e5e5'

DEBUG:cinderclient.client:
REQ: curl -i http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e/volumes/detail -X GET-H 'X-Auth-Project-Id: admin'-H 'User-Agent: python-cinderclient'-H 'Accept: application/json'-H 'X-Auth-Token: {SHA1}15e2f758dbdab55242242674c99308f5abb2e5e5'

RESP: [200] {'Content-Length': '1760', 'X-Compute-Request-Id': 'req-6800713d-fe3c-442d-a112-fed59d42e345', 'Connection': 'keep-alive', 'Date': 'Thu, 21 Apr 2016 05:57:26 GMT', 'Content-Type': 'application/json', 'X-Openstack-Request-Id': 'req-6800713d-fe3c-442d-a112-fed59d42e345'}
RESP BODY: {"volumes": [{"migration_status": null, "attachments": [{"server_id": "933da99a-b770-40c6-bae4-55eb73163e2b", "attachment_id": "d50ab443-246b-4c42-8fab-392f5c99f199", "attached_at": "2016-04-15T08:43:40.000000", "host_name": null, "volume_id": "48160134-98f3-47f5-a52d-48b6d3d27d19", "device": "/dev/vdb", "id": "48160134-98f3-47f5-a52d-48b6d3d27d19"}], "links": [{"href": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e/volumes/48160134-98f3-47f5-a52d-48b6d3d27d19", "rel": "self"}, {"href": "http://172.31.21.78:8776/ebb78c2dea2d4e81920abb460345a11e/volumes/48160134-98f3-47f5-a52d-48b6d3d27d19", "rel": "bookmark"}], "availability_zone": "nova", "os-vol-host-attr:host": "ip-172-31-21-78@lvmdriver-1#lvmdriver-1", "encrypted": false, "updated_at": "2016-04-15T08:43:41.000000", "replication_status": "disabled", "snapshot_id": null, "id": "48160134-98f3-47f5-a52d-48b6d3d27d19", "size": 1, "user_id": "caf7be7b99cf45aeb7809ce961837659", "os-vol-tenant-attr:tenant_id": "ebb78c2dea2d4e81920abb460345a11e", "os-vol-mig-status-attr:migstat": null, "metadata": {"readonly": "False", "attached_mode": "rw"}, "status": "in-use", "volume_image_metadata": {"kernel_id": "042e9c63-e4bc-4500-87c0-f31b0e5651c2", "checksum": "eb9139e4942121f22bbc2afc0400b2a4", "min_ram": "0", "ramdisk_id": "4d04adf7-e792-49c0-af14-194e3c6adda9", "disk_format": "ami", "image_name": "cirros-0.3.4-x86_64-uec", "image_id": "d563889b-7976-4e83-985d-e11c7647741d", "container_format": "ami", "min_disk": "0", "size": "25165824"}, "description": null, "multiattach": false, "source_volid": null, "consistencygroup_id": null, "os-vol-mig-status-attr:name_id": null, "name": null, "bootable": "true", "created_at": "2016-04-14T04:41:45.000000", "volume_type": "lvmdriver-1"}]}

DEBUG:cinderclient.client:RESP: [200] {'Content-Length': '1760', 'X-Compute-Request-Id': 'req-6800713d-fe3c-442d-a112-fed59d42e345', 'Connection': 'keep-alive', 'Date': 'Thu, 21 Apr 2016 05:57:26 GMT', 'Content-Type': 'application/json', 'X-Openstack-Request-Id': 'req-6800713d-fe3c-442d-a112-fed59d42e345'}
RESP BODY: {"volumes": [{"migration_staus": null, "attachments": [{"server_id": "933da99a-b770-40c6-bae4-55eb73163e2b", "attachment_id": "d50ab443-246b-4c42-8fab-392f5c99f199", "attached_at": "2016-04-15T08:43:40.000000", "host_name": null, "volume_id": "48160134-98f3-47f5-a52d-48b6d3d27d19", "device": "/dev/vdb", "id": "48160134-98f3-47f5-a52d-48b6d3d27d19"}], "links": [{"href": "http://172.31.21.78:8776/v2/ebb78c2dea2d4e81920abb460345a11e/volumes/48160134-98f3-47f5-a52d-48b6d3d27d19", "rel": "self"}, {"href": "http://172.31.21.78:8776/ebb78c2dea2d4e81920abb460345a11e/volumes/48160134-98f3-47f5-a52d-48b6d3d27d19", "rel": "bookmark"}], "availability_zone": "nova", "os-vol-host-attr:host": "ip-172-31-21-78@lvmdriver-1#lvmdriver-1", "encrypted": false, "updated_at": "2016-04-15T08:43:41.000000", "replication_status": "disabled", "snapshot_id": null, "id": "48160134-98f3-47f5-a52d-48b6d3d27d19", "size": 1, "user_id": "caf7be7b99cf45aeb7809ce961837659", "os-vol-tenant-attr:tenant_id": "ebb78c2dea2d4e81920abb460345a11e", "os-vol-mig-status-attr:migstat": null, "metadata": {"readonly": "False", "attached_mode": "rw"}, "status": "in-use", "volume_image_metadata": {"kernel_id": "042e9c63-e4bc-4500-87c0-f31b0e5651c2", "checksum": "eb9139e4942121f22bbc2afc0400b2a4", "min_ram": "0", "ramdisk_id": "4d04adf7-e792-49c0-af14-194e3c6adda9", "disk_format": "ami", "image_name": "cirros-0.3.4-x86_64-uec", "image_id": "d563889b-7976-4e83-985d-e11c7647741d", "container_format": "ami", "min_disk": "0", "size": "25165824"}, "description": null, "multiattach": false, "source_volid": null, "consistencygroup_id": null, "os-vol-mig-status-attr:name_id": null, "name": null, "bootable": "true", "created_at": "2016-04-14T04:41:45.000000", "volume_type": "lvmdriver-1"}]}