ACTIVEMQ6-4 Fixing tests after package and classes renames

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

this will include a few fixes for the tests including
hornetq-version renaming to activemq-version
merge #17 Fixing tests after package and classes renames
Remove references to HornetQ in doc and Comments
Replace urn:hornetq with urn:activemq
Merge #18