MQ transport is initialized twice in case of ceilometer and distributed mode

[Andrew Lazarev]

There are two separate features that use MQ transport:
1. Ceilometer notifications
2. api-engine communication

Now, transport code is implemented twice without any code reuse. Both tasks could use the same code and objects to communicate with MQ.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/153415

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/153415
Committed: https://git.openstack.org/cgit/openstack/sahara/commit/?id=264b5bb4c5e26bc3a0d586c2120d149080553904
Submitter: Jenkins
Branch: master

commit 264b5bb4c5e26bc3a0d586c2120d149080553904
Author: Andrew Lazarev <email address hidden>
Date: Thu Feb 5 14:43:30 2015 -0800

    Initialize MQ transport only once

    There are two separate features that use MQ transport:
    1. Ceilometer notifications
    2. api-engine communication

    Merged MQ initialization code for them.
    The question "Should they use the same MQ or not?" is out of
    scope of this CR.

    Change-Id: I6a38708bce4c031f9e759a29afbce14325960808
    Closes-Bug: #1413005