Comment 2 for bug 1459173

Reviewed: https://review.openstack.org/186002
Committed: https://git.openstack.org/cgit/stackforge/fuel-library/commit/?id=e8e777a55b6d31e197c97cc6380c2c0e49927b0a
Submitter: Jenkins
Branch: master

commit e8e777a55b6d31e197c97cc6380c2c0e49927b0a
Author: Bogdan Dobrelya <email address hidden>
Date: Wed May 27 15:47:42 2015 +0200

    Check if the rabbitmqctl command is responding

    W/o this fix, rabbitmqctl sometimes may hang failing
    many commands. This is a problem as it brings the rabbit node
    to unresponsive and broken state. This also may affect
    entire cluster operations, for example, when the failed command is
    the forget_cluster_node.

    The solution is to check for the cases when the command rabbitmqctl
    list_channels timed out and killed or termintated with exit codes
    137 or 124 and return generic error.
    There is also related confusing error message "get_status() returns generic
    error" may be logged when the rabbit node is running out of the cluster
    and fixed as well.

    Closes-bug: #1459173

    Change-Id: Ia52fc5f2ab7adb36252a7194f9209ab87ce487de
    Signed-off-by: Bogdan Dobrelya <email address hidden>