Disable ceph-mgr dashboard module
Disable ceph-mgr dashboard module

The ceph-mgr dashboard is enabled by default and we do not want it
to, as it listens on 0.0.0.0:7000 and exposes sensible cluster
internals.

Change-Id: I9f0c9daec8209f7991400c7450f0e8f227bf0362

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