[WFLY-1618] / [WFLY-490] Add model definitions for role mapping and add the XML handling.
[WFLY-490] Add the realm name to the group so that realm specific matches can be subsequently made.
[WFLY-490] Move all access control related resource definitions to core-service=management/access=authorization
[WFLY-456] Add the base resource definition for audit logging, currently just a place holder to illustrate where this will go.