If an expected flag is already in the desired state, RBD will raise an
InvalidArgument exception. This is okay, however not catching this will
result in volume operation errors.
Co-Author: Eric Harney <eharney@redhat.com>
Change-Id: Ib28b6a2867469e73307482827d9e336b10a58432
Closes-Bug: #1852628
(cherry picked from commit 9bc67c8978)