Added Storage HA support

Closes-Bug: #1366216
Feature: Storage HA support added over existing contrail HA nodes.
Change:
1. cinder backend rbd settngs done for openstack storage nodes.
2. cinder template config set to cinder HA vip.
3. global public_network set to newly added storage node address.
4. new cursh map is loaded using crushtool.
5. cinder rabbit host settings done for openstack storage nodes.
6. skipped compute-restart on openstack storage nodes.
7. added rabbit_port for cinder ha.

Test: verified storage HA by adding 2 openstack storage nodes on
      storage-master role. HA Cinder volume properly attached to
      VMs.

Change done based on Review comments:
1. removed tabs in storage-ceph-storage.py
2. grep -w added to match exact wip address
3. "storage os" comment changed to "storage openstack"
4. "cfg-hostlist" changed to "config-hosts" as per convention
5. added comments for new parameters
6. changed virsh secret list parsing logic
Change-Id: Idb0de4a72f753997188a71acadc4142dc5ce8032
Merge "Added Storage HA support" into R1.10