Zuul only handles .yaml as file extension, so rename the file so that it
gets used.
Fix the file so that tests work:
* Add kolla-kubernetes-base, it was missing here.
* Fix path of playbooks.
* Remove extra "---" and project name since it's not needed anymore (the
scripted change does not catch this, since it's an invalid file).
* Use legacy nodesets.
Needed-By: https://review.openstack.org/540670
Change-Id: I0320fc692a26ba2f4c973eaeef9d2df9d9fde536
Jeffrey Zhang