[WFCORE-9] Remove unused ExplicitTransformationDescriptionBuilder
[WFCORE-9] Unused code in ResourceTransformationContext(Impl)
[WFCORE-9] Chained resource transformer support
[WFCORE-9] Chained operation transformers
[WFCORE-9] Expose subsystem version from SubsystemRegistration
[WFCORE-9] Use proper ResourceTransformationContext impl for model-test and subsystem-test
[WFCORE-9] Enable placeholder registrations for subsystems
[WFCORE-9] Make the placeholder registry behave exactly the same as GlobalTransformersRegistry
[WFCORE-9] Use chained transformers for JMX subsystem
[WFCORE-9] Use chained transformers for remoting subsystem
[WFCORE-9] Use chained transformers for logging subsystem
[WFCORE-9] Chained core model transformers
[WFCORE-9] Simplify registration of chained transformers

Remove requirement for adding transformers for version deltas where no
transformation is needed.
[WFCORE-9] Cleanup

Use correct year in copyright headed of new classes
Fix some javadoc
[WFCORE-9] At the end of the resource only copy the affected model