network discovery errors because of missing keystone

[gordon chung]

following patch that checks for service availability before polling (https://review.openstack.org/#/c/104892/), network discovery meters are failing because it doesn't successfully validate registration. see errors in central agent logs

2014-08-25 13:37:51.289 23108 ERROR ceilometer.central.plugin [-] Skip due to keystone error
2014-08-25 13:37:51.290 23108 ERROR ceilometer.central.plugin [-] Skip due to keystone error
2014-08-25 13:37:51.291 23108 ERROR ceilometer.central.plugin [-] Skip due to keystone error
2014-08-25 13:37:51.564 23108 ERROR ceilometer.central.plugin [-] Skip due to keystone error

we should verify service in ceilometer rather than letting neutronclient internals determine this. doing so, we can verify the service is valid in ceilometer rather than neutronclient telling it's invalid too late.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/116999

[OpenStack Infra (hudson-openstack)]

Change abandoned by gordon chung (<email address hidden>) on branch: master
Review: https://review.openstack.org/116999

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/119211

[OpenStack Infra (hudson-openstack)]

Change abandoned by gordon chung (<email address hidden>) on branch: master
Review: https://review.openstack.org/119211
Reason: for https://review.openstack.org/#/c/117051/

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/117051
Committed: https://git.openstack.org/cgit/openstack/ceilometer/commit/?id=e6f40fb18f99fd8603f895d4985ca3da8ddfb6cd
Submitter: Jenkins
Branch: master

commit e6f40fb18f99fd8603f895d4985ca3da8ddfb6cd
Author: gordon chung <email address hidden>
Date: Tue Aug 26 19:02:53 2014 -0400

    fix network discovery meters

    currently we let neutronclient authenticate against keystone. this
    makes it impossible for us to figure out whether service is valid
    until too late (when we call poll neutronclient).

    this patch adds keystoneclient to check_keystone decorator so it
    can verify endpoints when keystoneclient is not available.

    Closes-Bug: #1361818
    Change-Id: Ia374e9b422ed8fa088b28ecf200161248136b09e