Isolate the Ceph storage and storage_mgmt nets

Isolate the Ceph storage and storage_mgmt nets

This patch updates the Ceph configuration for the puppet
implementation so that it isolates the Ceph traffic
for the public and cluster interfaces. By default public traffic
runs on the "storage" network and the cluster traffic runs on the
"storage mgmt" network.

If network isolation is not enabled then the default
ctlplane address's will be used for both the public and
cluster interfaces.

Change-Id: I791244d72c8f42142d9de99e0cf0acdca19e62b0