tempest volume quota validation breaks cinder stable/ocata runs

[Eric Harney]

https://review.opendev.org/#/c/603339/ added validation to cinder APIs, this breaks cinder stable/ocata as seen on

https://review.opendev.org/#/c/681477/1/ in legacy-tempest-dsvm-neutron-full

tempest.lib.exceptions.InvalidHTTPResponseBody: HTTP response body is invalid json or xml
Details: HTTP response body is invalid ('groups' is a required property
Failed validating 'required' in schema['properties']['quota_set']:

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.opendev.org/681776

[Ken'ichi Ohmichi (oomichi)]

As https://github.com/openstack/tempest/blob/master/releasenotes/notes/tempest-stein-release-18bad34136a2e6ef.yaml the latest Tempest doesn't support Ocata.
So we need to use the tag of Ocata supported Tempest with https://github.com/openstack/tempest/releases/tag/20.0.0

[Ghanshyam Mann (ghanshyammann)]

new field 'groups' seems added in API response without new microversion ? if so then it seems API interoperability issue. All fields added/removed/updated in API response should be with new microversion.
This seems Cinder bug for me which is caught by Tempest schema validation.

[Ghanshyam Mann (ghanshyammann)]

On Ocata support from Tempest master-

Yeah, Tempest master does not support Ocata branch as this is in EM state. as per Tempest stable branch policy, if EM branch fails due to master changes then that branch needs to use Tempest working tag instead of Tempest master.[1]

We need to install Tempest v20.0.0 in Ocata.

[1] https://docs.openstack.org/tempest/latest/stable_branch_support_policy.html

[OpenStack Infra (hudson-openstack)]

Change abandoned by Eric Harney (<email address hidden>) on branch: master
Review: https://review.opendev.org/681776