HORNETQ-1367 - Allow QueueControlImpl.removeMessage(long) to operate on scheduled messages
HORNETQ-1370 - Setting String property to null on a Message breaks XMLExporter tool
HORNETQ-1372 & BZ1113908 - TopicControl.listDurableSubscriptionsAsJSON does not work with heirarchical topics
Merge pull request #1715 from jbertram/2.4.x

2.4.x