Bug 1485015

+++ This bug was initially created as a clone of Bug #1483160 +++

Description of problem:
When the Active share service stops and another, passive share service takes over as the active, when the share service that was stopped comes back, the shares that were on the other share service will become unavailable for Manila to control.

Version-Release number of selected component (if applicable):
openstack-manila-3.0.0-8.el7ost.noarch
openstack-manila-ui-2.5.1-9.el7ost.noarch
puppet-manila-9.5.0-1.el7ost.noarch
python-manilaclient-1.11.0-1.el7ost.noarch
python-manila-3.0.0-8.el7ost.noarch
openstack-manila-share-3.0.0-8.el7ost.noarch

How reproducible:
100%

Steps to Reproduce:
1. Use Infrared to deploy an OSP-10z4 deployment with Manila and with at least 2 controller nodes and any number of compute nodes. I used a NetApp backend for the storage.
2. Disable the active Manila Share service. Observe that the service will start on another controller node.
3. Create a share on the new share service.
4. Re-enable the disabled share service and observe that the share that was created is no longer controllable by Manila. 

Actual results:
Manila shares created on the other share service become uncontrollable when the first share service is reactivated.

Expected results:
Disruption of the share service shall not impact Manila shares.

Additional info:
I looked into how Cinder does Volume service HA and they use a hostgroup for all of the volume services so that the "hostname" of the volume service does not change when another volume service takes over the active role. Chances are something similar will need to happen to Manila as well.