Comment 4 for bug 1663936

Reviewed: https://review.openstack.org/445942
Committed: https://git.openstack.org/cgit/openstack/os-brick/commit/?id=04c4d07dc4471fe4e971835d8c3698c79f13ba17
Submitter: Jenkins
Branch: stable/ocata

commit 04c4d07dc4471fe4e971835d8c3698c79f13ba17
Author: Gorka Eguileor <email address hidden>
Date: Sat Feb 11 21:40:39 2017 +0100

    Retry multipath flush when map is in use

    When flushing a multipath we are ignoring map in use transient error, so
    we log a warning that the flush has not been successful and that we have
    received an exit code 1 and we continue to remove the individual paths.

    This error is usually transient and a simple retry will succeed in
    flushing the multipath.

    Failure to retry will leave an empty multipath in our system.

    Closes-Bug: #1663936
    Depends-On: I31310dc9b3834e0bf16618db3e473f17eab2b610
    Change-Id: I710792bd707ad933ef60d11d25f530dddfb6fb2f
    (cherry picked from commit 32c837dacb38910e9191b1a3f18283b3c52fb2b2)