First pass at log4j2 upgrade (in progress).
APF-1442: Upgraded to Log4J2, which required upgrades for Hibernate, Hibernate EntityManager, Hibernate Search and some configuring/excluding of dependencies.
APF-1442: Renamed log4j.xml to log4j2.xml for Log4j2 upgrade.
Merge branch 'master' into log4j2-upgrade
APF-1442: Migrated AMP to Log4j2
Merge pull request #18 from appfuse/log4j2-upgrade

APF-1422: Upgrade to Log4J 2.0