Updated openstack/openstack
Project: openstack/cinder  9f138a1efdab9dd0f7b4bbfc9835bd53dfed762b
null
Fixes inappropriate error message.

"Volume cannot be deleted while migrating" as error message in
create_snapshot is inappropriate while volume is migrating.

Change-Id: I6cfaf312f9b1edbf4e54f737664290d6ab3b6332
Closes-Bug: #1252175