WFLY-3768 Implement graceful shutdown for MDB's
adding null check for instanceManager
[WFLY-3534] - Updating code to reflect changes from transaction subsystem.
WFLY-3837 Add tests for @RolesAllowed use if bean class has superclasses
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-3189 - Do not use schema location in schema element. Do not use
schemaLocation when importing a namespace.

XML validators seem to get confused when schema location is specified
and imports / includes are circular. Instead rely on entries in XML
catalogue.
Add XML schema for namespace "urn:clustering:1.0" which is mentioned in

https://docs.jboss.org/author/display/AS71/jboss-ejb3.xml+Reference, but
missing this plugin and in JBoss EAP 6 distribution. Based on
"jboss-ejb-security_1.0.xsd".