Merge pull request #1096 from FranciscoBorges/master

Require Java7 on master already
HORNETQ-756 - new tests that for incorrect content type when creating a queue or topic
Merge pull request #1097 from clebertsuconic/HORNETQ-756

HORNETQ-756 - new tests that for incorrect content type when creating a queue or topic
HORNETQ-1219 Fix inconsistent 'null' property behavior.