XD-1250 RabbitMessageBus Shutdown

Several issues resolved:

1. The message bus was using unnamed auto-delete queues for pub/sub.
      A connection glitch would cause such queues to be deleted and
      the container could not recover.
   - changed to use AnonymousQueue and configure the admin to redeclare
     the queue and binding when necessary.

2. The module-common context was never closed so the RabbitMessageBus
      containers would go into recovery mode; currently this is a hard-
      wired 15 second delay (3x5 seconds).
   - the ModuleDeployer is now a `DisposableBean` and destroys all
     deployed modules and the common module context.

3. Changed `RabbitSingleNodeStreamDeploymentIntegrationTests` to delete
      the deployment queues after all contexts are closed.