Implement the dumping of rabbitMQ definitions

[OpenStack Infra]

https://review.openstack.org/132967
commit 8ccdfc62152de8212ba6a0aeed45c1e3677c70a4
Author: Stanislav Makar <email address hidden>
Date: Thu Apr 16 14:32:51 2015 +0000

    Implement the dumping of rabbitMQ definitions

    This changes leverages the rabbitmq management plugin to dump
    exchanges, queues, bindings, users, virtual hosts, permissions and
    parameters from the running system. Specifically this change adds the
    following:

    * The dumping rabbitMQ definitions (users/vhosts/exchanges/etc) during
      the end of the deployment
    * The possibility to restore definitions to the rabbitmq-server ocf
      script during rabbitMQ startup.
    * Enabled rabbitmq admin plugin, but restricts it to localhost traffic.
      This reverts Ic01c26200f6019a8112b1c5fb04a282e64b3b3e6 but adds
      firewall rules to mitigate the issue.

    DocImpact: The dump_rabbit_definitions task can be used to backup the
    rabbitmq definitions and if custom definitions (users/vhosts/etc) are
    created it must be run or the changes may be lost during the rabbitmq
    failover via pacemaker.

    Change-Id: I715f7c2ae527f7e105b9f6b7d82c443e8accf178
    Closes-bug: #1383258
    Related-bug: #1450443
    Co-Authored-By: Alex Schultz <email address hidden>