tripleo-common-tempest-plugin needs CI coverage

[Dougal Matthews]

The new tempest plugin for testing tripleo-common Mistral workflows is currently not setup in CI.

We need to add support in tripleo-quickstart to run the tempest plugin against a tripleo undercloud.

[Dougal Matthews (d0ugal)]

Collecting some pointers I've recieved how to do this here:

https://docs.openstack.org/tripleo-quickstart/latest/getting-started.html#validate-the-tripleo-overcloud-is-functional

- https://github.com/openstack/tripleo-quickstart-extras/blob/master/playbooks/quickstart-extras-validate.yml
- https://github.com/openstack/tripleo-quickstart-extras/tree/master/roles/validate-tempest
- "you will see in the tq/config/general_config/featureset yaml files that different jobs install different sets of tempest plugins"
- you'll need to point tempest config at the undercloud
- Possibly can be based on scenario003

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/522302

[Dougal Matthews (d0ugal)]

Other related patch https://review.openstack.org/522300

[OpenStack Infra (hudson-openstack)]

Change abandoned by Dougal Matthews (<email address hidden>) on branch: master
Review: https://review.openstack.org/522302

[OpenStack Infra (hudson-openstack)]

Change abandoned by Dougal Matthews (<email address hidden>) on branch: master
Review: https://review.openstack.org/522300