Comment 3 for bug 1502979

Reviewed: https://review.openstack.org/231135
Committed: https://git.openstack.org/cgit/openstack/os-brick/commit/?id=d937f64af2ea4a9747725061d5b558c6c38a09f6
Submitter: Jenkins
Branch: master

commit d937f64af2ea4a9747725061d5b558c6c38a09f6
Author: Gorka Eguileor <email address hidden>
Date: Mon Oct 5 20:17:20 2015 +0200

    Fix FC multipath cleanup

    Cleanup order for multipath should be:
    - Flush multipath (multipath -f device)
    - Flush blockdev devices (blockdev --flushbufs device)
    - Remove paths

    But now we have:
    - Flush blockdev devices (blockdev --flushbufs device)
    - Flush multipath (multipath -f device)
    - Remove paths

    This patch sets the right order and adds a test to avoid regression.

    Closes-Bug: #1502979
    Change-Id: I065a79514e0fcaf722f57e2edd6f18f31878c711