OGM-553 neo4j missing dependencies

https://hibernate.atlassian.net/browse/OGM-553

This pull request will update the JBoss modules for EAP and Wildfly and the distribution package adding the missing dependencies for Neo4j.

I've also added an integration test for Neo4j. Note that this test is much simpler than the one for the other back-ends and the main purpose is to check that the container starts with the deployed modules (I could not find a way to run successfully all the tests like for the other containers).
Ok, my understanding is that one optionally can also use the Cypher 1.9 syntax with Neo4j 2.x (some things are apparently not yet possible in 2.x which worked with 1.9). You need to prefix your query with "CYPHER 1.9" for that purpose. So indeed it makes sense to have both dependencies here.