[BZ 1175774] - Make JBoss ON code base buildable with jdk 8

Talking Maven to build with Java 8

Here are things that caused build to failed:

* very strict javadoc checker
* animal sniffer, I used this workaround (https://jira.codehaus.org/browse/MANIMALSNIFFER-45) once the bug is solved we may upgrade the animal sniffer
* jmx plugin was starting AS and failing
* ANTLR issue (https://github.com/antlr/antlr3/issues/151) -> upgrading the ANTLR version
* mod_cluster plugin required the dependency on 'jboss-profileservice-spi' (scope = provided)

Before merging, I need to smoke test it and ensure it is still buildable/runnable on jdk6 and jdk7.