OGM-276 Upgrade integration test to JBoss AS 7.2 Alpha1
OGM-276 Update documentation to JBoss AS 7.2
OGM-284 Upgrade checkstyle to 2.10

 Before this change checkstyle wasn't working for the integration test
 submodules.
OGM-284 Fix checkstyles violation
OGM-286 Fix integration tests maven configuration