Comment 4 for bug 1226398

Reviewed: https://review.openstack.org/48555
Committed: http://github.com/openstack/cinder/commit/1629ab4cd88bcd5f5caafb78fb1339ec57e01ff1
Submitter: Jenkins
Branch: stable/grizzly

commit 1629ab4cd88bcd5f5caafb78fb1339ec57e01ff1
Author: Ken'ichi Ohmichi <email address hidden>
Date: Tue Sep 17 13:29:51 2013 +0900

    Allow display_name for v2 snapshot-update

    According to the comment in the source code, the snapshot-update of
    v2 would be able to allow either "name" or "display_name" parameter.
    And if both paramters are specified, "name" parameter is effective
    over "display_name" like "description" parameter.
    However "display_name" parameter is ignored now, because cinder writes
    over empty dict(update_dict['display_name']).

    This patch fixes the problem.

    Fixes bug #1226398

    Change-Id: Icd48556a26b9346f73b7c1b82ffbcdd469c4d28d
    (cherry picked from commit 622f10e87fda5dc439d43543216d953920079282)