[BZ-1155492] - PicketLink Subsystem dissapears after removing last federation after reload.
[BZ-1151002] - Validation of code/class-name. Fixing code doc in schema.
[BZ-1150639] - Class-name/code attributes causes conflicts in PicketLink IDM subsystem.
Fixing test cases.
[BZ-1151230] - Validation is not invoked when changing existing partition manager configuration in IDM subsystem.
Changing message.
PL fixes from code review
[BZ-1121155] - PicketLink SP application configuration is ignored when it is also added to PicketLink subsystem.
Merge pull request #6855 from pedroigor/master

[WFLY-3978] - PicketLink EAP 6.4 Issues