https://issues.jboss.org/browse/HORNETQ-1351 Updated QueueImpl so that consumers are only round-robined when the consumer is used. Updated as requested by
https://community.jboss.org/thread/240966
Merge pull request #1652 from clebertsuconic/2.4.x

https://issues.jboss.org/browse/HORNETQ-1351 Updated QueueImpl on grouping