Zuul: add file extension to playbook path
Zuul: add file extension to playbook path

Zuul now supports including the file extension on the playbook path
and omitting the extension is now deprecated. Update references
to include the extension.

Change-Id: I95c6dd53713fc1d0a287fce9b42afdce1eba198c

openstack/ironic-inspector,openstack/ironic-inspector