ceph-ansible is not used anymore in master and both ceph
deployment and day2 ops are managed by the new cephadm tool.
This change aligns the tripleo-heat-templates tree to make sure
only cephadm is used to deploy Ceph (see [1]).
[1] https://blueprints.launchpad.net/tripleo/+spec/tripleo-ceph
Change-Id: Ib87615112264bd65e38ed7fb4440cca62f067de5