Merge pull request #6690 from ssilvert/WFLY-3806-org.jboss.metadata.main

Move metadata aggregation module to web-feature-pack.
Merge pull request #6693 from soul2zimate/WFLY-3837

WFLY-3837 Add tests for @RolesAllowed use if bean class has superclasses
Merge pull request #6668 from stuartwdouglas/WFLY-3768

WFLY-3768 Implement graceful shutdown for MDB's
Merge pull request #6678 from The-Alchemist/WFLY-3820

fix for WFLY-3820: adding null check for instanceManager
Merge pull request #6685 from pedroigor/WFLY-3534

[WFLY-3534] - Updating code to reflect changes from transaction subsystem.
WFLY-3844 invlidate the principal cache on logout