Added test for for return queues from ActiveMQ
Added method on Activemq for finding queue by uid.
Sucessfuly have a 'live' queue metric appearing. That was easy ... :-/
Ensure all tests are passing for ActiveMQ and Queue abstraction.
Exposed queue name as pcp metric
Expose dequeue_count, enqueue_count and average_enqueue_time for queue
Dynamic discovery of queues are working. **There is an edge case that caused pmda exiting.