This runs the ansible playbooks to completion.

It does not validate that OpenStack is working yet, but it will ensure
Ansible did not break.

Additional gates will be needed for this and there is a patch in
project-config to handle that.

Change-Id: I7a24a704023cc8f19d42844636e9cb512060f693
backport: liberty
Partially-Implements: blueprint functional-testing-gate