Add CI job for ironic

Adds four new CI jobs for testing centos/ubuntu binary/source deploys
with ironic enabled. These are run only when there are changes to the
ironic role.

Performs some simple testing by creating a node using the fake-hardware
hardware type and creating a server.

Change-Id: Ie669e57ce2af53257b4ca05f45193cb73f48827a
Depends-On: https://review.opendev.org/664011