Fix deploy ceph failed when contoller hava no cluster_interface

when ceph-mon and ceph-osd run on difference hosts
such as ceph-mon run on controller node, ceph-osd
run on storage node, and controller node have no
cluster_interface, when it happens, kolla-ansible
will failed.

Closes-Bug: #1735775 

Change-Id: I8d6bc66d41c544ab9e7e1b126127e25c70a22933