ACTIVEMQ6-1 - Initial HornetQ Donation Commit

https://issues.apache.org/jira/browse/ACTIVEMQ6-1

This is the initial donation of the HornetQ codebase as per document http://incubator.apache.org/ip-clearance/hornetq.html
ACTIVEMQ6-2 Update to HQ master
ACTIVEMQ6-4 - Rename packages to ActiveMQ

https://issues.apache.org/jira/browse/ACTIVEMQ6-4

Repackage the modules, java source and maven poms to apache.activemq6