Comment 4 for bug 1789699

Reviewed: https://review.openstack.org/603108
Committed: https://git.openstack.org/cgit/openstack/os-brick/commit/?id=f2fed213f6b1d36513504d0ec4ebbfeeddc52b94
Submitter: Zuul
Branch: stable/rocky

commit f2fed213f6b1d36513504d0ec4ebbfeeddc52b94
Author: Gorka Eguileor <email address hidden>
Date: Wed Aug 29 19:16:58 2018 +0200

    Improve detection of multipathd running

    There is a case where `multipathd show status` should fail, yet it
    doesn't exit with an error code. Instead it returns 0. Error is printed
    to stdout as "error receiving packet".

    This means that enforce will not work as expected.

    The multipathd error got fixed here:
    https://www.redhat.com/archives/dm-devel/2015-March/msg00136.html

    But that patch is missing in some packages, so this patch adds a
    workaround to detect the error base on the stdout of the multipathd show
    status command.

    Closes-Bug: #1789699
    Change-Id: I1cb29782541e3fe53b0b1744ab36f56464cd2135
    (cherry picked from commit 028af871de8a3f45f4cc8342e92d5586a7058e5a)