DM: Graceful cleanup of RabbitMQ message queues when DM stops
DM: Graceful cleanup of RabbitMQ message queues when DM stops

Delete RMQ message queues when DM receives stop signal, this will ensure
queues gets deleted when DM gets stopped gracefully.

Closes-Bug: #1524548
Change-Id: Ifc3baccb5fc5d98a76a6b191841ab45d654f330d

eonpatapon/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,tcpcloud/contrail-controller,tcpcloud/contrail-controller,sajuptpm/contrail-controller,sajuptpm/contrail-controller,rombie/contrail-controller,codilime/contrail-controller,nischalsheth/contrail-controller,codilime/contrail-controller,eonpatapon/contrail-controller,codilime/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,eonpatapon/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,rombie/contrail-controller,nischalsheth/contrail-controller,nischalsheth/contrail-controller,rombie/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,codilime/contrail-controller,codilime/contrail-controller,nischalsheth/contrail-controller,eonpatapon/contrail-controller,tcpcloud/contrail-controller,nischalsheth/contrail-controller,tcpcloud/contrail-controller,eonpatapon/contrail-controller,codilime/contrail-controller,nischalsheth/contrail-controller