Fix incorrect replication info for RBD
Fix incorrect replication info for RBD

It was brought to my attention that the RBD driver
does now have replication working.  As a result I
am updating that information with this patch.

Change-Id: I01dc1101d66379c41d32b6883b4db1fc28d7c2b4

mahak/cinder,openstack/cinder,openstack/cinder,mahak/cinder