Merge pull request #1774 from jbertram/master

fix scale-down tests that could never succeed
Update dependendencies to JTA 1,2

JTA 1,2 has backwards compatibility with JTA 1.1 so this should be a
straight swap.
Merge pull request #1776 from mtaylor/jta_1_2

Update dependendencies to JTA 1,2
Fix failing HornetQMessageHandlerTest test-cases
updated Vert.x deps and refactor jackson-databind dep to prevent Vert.x test problems (since it uses an older version of jackson-databind)