Make CephPools override properties of other pools
Make CephPools override properties of other pools

Previously it was possible to use CephPools tol override properties
of any pool, not only the additional ones defined via CephPools
parameter.

This change restores the functionality which was broken with the
migration of the templates to ceph-ansible.

Change-Id: Id184d5e7fe60c789944159ea32dc1267aca9decb
Closes-Bug: #1734093

dprince/tripleo-heat-templates,dprince/tripleo-heat-templates,openstack/tripleo-heat-templates,openstack/tripleo-heat-templates