title: ActiveMQ queued messages dequeue with no consumer
body: <p>I have recently started using ActiveMQ 5.8. I have the default activemq.xml setup and am doing some simple testing with the ActiveMQ web admin. When I send a message to a queue through the ui, the queue will show a pending message for about 5 seconds, then the message will get dequeued. There are no consumers set up on this queue. Why is the message not staying in the queue? In older versions of ActiveMQ, doing this same procedure, the message will remain in the queue, as expected. Did something change with 5.8?</p>