BZ #1142528 - open up ceph mon port on controllers

https://bugzilla.redhat.com/show_bug.cgi?id=1142528

For now, if RBD is enabled, assume we have ceph mon's running on the
controllers.
Merge pull request #371 from cwolferh/bz1142528_ceph_mon_port

BZ #1142528 - open up ceph mon port on controllers