Fix typo in vgc-cluster command in rootwrap file
Fix typo in vgc-cluster command in rootwrap file

Trivial fix to change the "vg*s*-cluster" to the correct "vgc-cluster"
required for the HGST cluster management software.

Change-Id: I1510986a321f60fd5588fea7613dc2a4ba11430d
Closes-Bug: 1498625

openstack/os-brick,openstack/os-brick