Issue
   Provisiong is failing when we have multiple webui host
   HA enable for ceph rest api IP

Fix:
   Removed the for loop to get all webui host name, it will be taken care the @task framew
   If HA is enable get the cinder vip IP or storage master ip.

Closes Bug: 1386446, 1386450

Change-Id: I5bd178cce1805d2febafdf6520ecf4c89c83f509