LPS-32783 Creating new SMDHs and copy/paste the relevant methods from DLPortletDataHandler. Also cleaning DLPortletDataHandler up
LPS-32783 Registering new StagedModelDataHandlers in liferay-portlet.xml
LPS-32783 Apply changes to SMDHs to fit to the new environment
LPS-32783 Apply changes to the portlet data handlers
LPS-32783 Apply changes to portlets referencing document library
LPS-32783 Fix LiferayFileEntry clone method for NPE