Change-Id: I2e736920f5b2cb4a78c2e6c216665394faf83001

ceph-ansible by default uses "latest" tag for ceph Docker Hub images,
but recently latest tag has been upgraded to be Octopus release,
not Nautilus.

Change-Id: I5247c10079ab91cce130cd5ba403f25ccaf7c1fb

Change-Id: If354fbdeb2fd8d026faa0210b84da0a688c3ae0a

* Adding zuul centos-source/ubuntu-source ceph-ansible jobs
* Jobs will deploy all Ceph integrated OpenStack components, i.e.
  cinder, glance, nova
* Will utilize core openstack testing script

Depends-On: https://review.opendev.org/685032
Depends-On: https://review.opendev.org/698301

Implements: blueprint ceph-ansible
Change-Id: I233082b46785f74014177f579aeac887a25b2ae2