To separate data and control plane of storage layer;
Moving queue_controller from data to controll plane.
Trying to shift the QueueController object in Control plane.
For this new MessageQueueHandler class is also added inside storage/x/messages.py
And the newly added handler is added to the entry point.
Implements: blueprint split-data-and-control-plane
Co-Author: Flavio Percoco<flavio@redhat.com>
Change-Id: I8a167d6ed8e54c98b077b9ea56e68b4e8d5b0291
c3a5718775