Update Hibernate Version

Update Roo Hibernate version.

Change hibernate version with the following:

• hibernate-core --> 4.3.6.Final
• hibernate-entitymanager --> 4.3.6.Final
• hibernate-jpa-2.1-api --> 1.0.0.Final
• hibernate-validator --> 4.3.2.Final

Execute integration tests to be sure that new version of hibernate is supported with previous functionalities of Roo.