LPS-34081 Change PDC to allow to export and reference not just StagedModel instances
LPS-34081 Add SMDH's skeletons
LPS-34081 Copy&Paste existing code to the new data handlers
LPS-34081 Change SMDH's to follow the new staging pattern
LPS-34081 Apply changes to JPDH
LPS-34081 Apply changes to JCPDH
LPS-34081 Register SMDH's
LPS-34081 Apply changes
LPS-34081 Fix broken DL reference handling