This patch adds group replication capabilities for
the IBM driver for the A-line system.
implements:
* Enable replication on group
* Disable replication on group
* Fail over replication
* Get replication error status
Implements: blueprint replication-cg-ibm-storage
Change-Id: Ic59c568502258096e24ca5ab81dc5b8cd1779995
Depends-On: Ia4af4dd011d569a3ac84387b37dcf2606da48fba