placement functional tests can variably fail because of conf

[Chris Dent]

When running just the placement functional tests with `tox -efunctional placement` on a host with sufficient cpus (16 in this case, on a host with only 4 it wasn't happening) some tests can fail because of conf not being properly set with "oslo_config.cfg.NoSuchOptError: no such option oslo_policy in group [DEFAULT]". Example traceback at http://paste.openstack.org/show/728513/

This appears to because in some cases registering the policy opts is happening elsewhere in the processing before running the gabbi tests but only sometimes. This is a symptom of long term global conf leakage that we may wish to consider fixing, but the short term fix is to register the opts in the gabbi fixture. Patch forthcoming.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/594172

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/594334

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/594172
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=2b46354d5ab6d59790e69c44bc36a17074155774
Submitter: Zuul
Branch: master

commit 2b46354d5ab6d59790e69c44bc36a17074155774
Author: Chris Dent <email address hidden>
Date: Tue Aug 21 14:23:41 2018 +0100

    Set policy_opt defaults in placement gabbi fixture

    Without this change, tests can intermittently fail with NoSuchOptError
    when a single process does not have other tests running prior to
    gabbi tests. This change ensure the opts are registered and defaulted.

    Change-Id: I1c7e347b6e788928bef96e32c3365d0fdc5ba00f
    Related-Bug: #1786498
    Closes-Bug: #1788176

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/594334
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=f7c5aca3b2b57547c9f95b8432da60b59d66fadf
Submitter: Zuul
Branch: master

commit f7c5aca3b2b57547c9f95b8432da60b59d66fadf
Author: Chris Dent <email address hidden>
Date: Tue Aug 21 16:56:43 2018 +0100

    Set policy_opt defaults in placement deploy unit test

    Without this change, tests can intermittently fail with NoSuchOptError
    when a single process does not have the ConfigFixture running before
    this test. This change ensure the opts are registered and defaulted.

    Change-Id: I6a4873726e3e7fe0d4db3d1dea61309702b8f24b
    Closes-Bug: #1788176

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 19.0.0.0rc1 release candidate.