Comment 5 for bug 1706777

Reviewed: https://review.openstack.org/560451
Committed: https://git.openstack.org/cgit/openstack/cinder/commit/?id=664974c0218519d2740ae4284a4b977269d76df9
Submitter: Zuul
Branch: stable/pike

commit 664974c0218519d2740ae4284a4b977269d76df9
Author: Michael Price <email address hidden>
Date: Fri Sep 22 15:51:48 2017 -0500

    NetApp E-Series: Fix broken generic volume groups

    The Generic Volume Groups functionality is currently broken in the
    E-Series driver because it is not defining/removing a back-end
    consistency group when creating/deleting a generic group.

    This patch adds an implementation method in the respective E-Series
    drivers to utilize the underlying CG functionality.

    Closes-Bug: #1706777
    Change-Id: I55dc417060d9226c2f120a16b031a79839d483d3
    (cherry picked from commit 443dfd9d8c464ba18d2fcd5c3b3fc10602923fde)