tempest plugin is broken

[Emilien Macchi]

Tempest code moved from openstack/tempest to trove itself as a plugin.
But now, tests don't work anymore.

This patch: https://review.openstack.org/#/c/336047/ is helping to fix some imports, but we still have some issues with config registration: https://github.com/openstack/trove/blob/master/trove/tests/tempest/plugin.py#L33-L41

Also, Trove gate is not voting on tempest jobs and it's really bad, we should fix it because it affects downstream CIs, like Puppet etc.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/336710

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/336710
Committed: https://git.openstack.org/cgit/openstack/trove/commit/?id=de1d5a9f8805c8c80b16f0d1c40a0853ee72a991
Submitter: Jenkins
Branch: master

commit de1d5a9f8805c8c80b16f0d1c40a0853ee72a991
Author: Mariam John <email address hidden>
Date: Fri Jul 1 11:53:59 2016 -0700

    Fix config registration for Trove tempest plugin

    The Trove tempest plugin was created in this commit:
    Ibad5502cdca0e34cca4b5bc8a7106611f7393cf2. The tests however was
    not working because the plugin specific configuration variables
    was not being set correctly. This particular issue has been
    fixed in this changeset. Using the following commands:
        tox -e all-plugin -- trove.tests.tempest.tests.api
    4/5 tests pass. Will look into the failing test in a different
    changeset.

    Change-Id: Iad34209adb120e63cebbf12939baf30c5f017844
    Partial-Bug: #1597857