Fix war overlay in functional-test

- added a new module to create the overlay (with only needed code and libraries)
- functional test will no longer build war overlay but just executing tests
Merge pull request #556 from zanata/fix-war-overlay

Fix war overlay in functional-test
fix after overlay rename
fix home and help content config to be consistent with other config
Merge pull request #559 from zanata/fix-home-content-config

Prevent access failure when editing home content or help content.
Add DummyAuthenticationMechanism to replace SPNEGO on WildFly
Add comments to persistence.xml
Update jboss-deployment-structure.xml to be compatible with WildFly 8.1 and EAP 6
Remove invalid use of @NonEmpty on a setter
add profile to functional-test to run against wildfly 8