Only copy nfs_shares to cinder-volume groups
Only copy nfs_shares to cinder-volume groups

Co-Authored-by: Mick Thompson <34cd3329a4007e43cddf583a4627a7753427bd44@oracle.com>
Change-Id: I673950cb6cead9b18ee67a0971ed305ef5e3af2d
Closes-Bug: #1713010

dardelean/kolla-ansible,dardelean/kolla-ansible,dardelean/kolla-ansible