3PAR: Replace ConsistencyGroup
3PAR: Replace ConsistencyGroup

Remove the experimental consistency group APIs and replace them with the
experimental Share Group APIs

Change-Id: I4a3591d94f0df0f266ec9dd8b5a89ee93087455a
Closes-Bug: #1662427

bswartz/manila,openstack/manila,bswartz/manila,openstack/manila,vponomaryov/manila,vponomaryov/manila