[cinder] [quotas] 18 Tempest test cases failed for Cinder: quotas issue

[Timur Nurlygayanov]

Test cases:
https://mirantis.testrail.com/index.php?/runs/view/5011&group_by=cases:section_id&group_order=asc&group_id=14732

test_delete_quota[id-874b35a9-51f1-4258-bec5-cd561b6690d3] Failed
test_list_default_quotas[id-2be020a2-5fdd-423d-8d35-a7ffbc36e9f7] Failed
test_list_default_quotas[id-2be020a2-5fdd-423d-8d35-a7ffbc36e9f7] Failed
test_list_quotas[id-59eada70-403c-4cef-a2a3-a8ce2f1b07a0] Failed
test_list_quotas[id-59eada70-403c-4cef-a2a3-a8ce2f1b07a0] Failed
test_update_all_quota_resources_for_tenant[id-3d45c99e-cc42-4424-a56e-5cbd212b63a6] Failed
test_delete_quota[id-874b35a9-51f1-4258-bec5-cd561b6690d3] Failed
test_quota_usage[id-ae8b6091-48ad-4bfa-a188-bbf5cc02115f] Failed
test_show_quota_usage[id-18c51ae9-cb03-48fc-b234-14a19374dbed] Failed
test_quota_usage[id-ae8b6091-48ad-4bfa-a188-bbf5cc02115f] Failed
test_quota_volume_gigabytes[id-2dc27eee-8659-4298-b900-169d71a91374,negative] Failed
test_update_all_quota_resources_for_tenant[id-3d45c99e-cc42-4424-a56e-5cbd212b63a6] Failed
test_show_quota_usage[id-18c51ae9-cb03-48fc-b234-14a19374dbed] Failed
test_quota_volumes[id-bf544854-d62a-47f2-a681-90f7a47d86b6,negative] Failed
test_quota_volume_gigabytes[id-2dc27eee-8659-4298-b900-169d71a91374,negative] Failed
test_quota_volume_snapshots[id-02bbf63f-6c05-4357-9d98-2926a94064ff,negative] Failed
test_quota_volume_snapshots[id-02bbf63f-6c05-4357-9d98-2926a94064ff,negative] Failed
test_quota_volumes[id-bf544854-d62a-47f2-a681-90f7a47d86b6,negative] Failed

failed on nightly CI.

Traceback (most recent call last):
  File "/home/developer/mos-tempest-runner/tempest/tempest/api/volume/admin/test_volume_quotas.py", line 51, in test_update_all_quota_resources_for_tenant
    self.demo_tenant_id)['quota_set']
  File "/home/developer/mos-tempest-runner/tempest/tempest/services/volume/json/admin/volume_quotas_client.py", line 32, in show_default_quota_set
    resp, body = self.get(url)
  File "/home/developer/mos-tempest-runner/.venv/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 274, in get
    return self.request('GET', url, extra_headers, headers)
  File "/home/developer/mos-tempest-runner/.venv/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 639, in request
    resp, resp_body)
  File "/home/developer/mos-tempest-runner/.venv/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 753, in _error_checker
    message=message)
tempest_lib.exceptions.ServerFault: Got server fault
Details: The server has either erred or is incapable of performing the requested operation.

[Timur Nurlygayanov (tnurlygayanov)]

diagnostic snapshot:
https://drive.google.com/file/d/0Byup6hoNUUUeS3NmZFJyN1BMQjA/view?usp=sharing

[Timur Nurlygayanov (tnurlygayanov)]

It is regression issue and we have 18 failed Tempest tests because of this issue.