LPS-41340 Add new ExportImportClassUtil and refactor first method to it. More to follow
LPS-41340 Implement delete methods for asset category and asset vocabulary staged model data handlers
LPS-41340 Implement referencing between categories/parent categories/vocabulary
LPS-41340 No logic changes - Move export and import code for categories and vocabularies
LPS-41340 Apply changes to SMDHs
LPS-41340 No logic changes - Copy method from PortletDataContext to BaseStagedModelDataHandler
LPS-41340 Apply changes to BaseStagedModelDataHandler - entity associated categories should be exported and imported
LPS-41340 Add portlet data handler skeleton for assets and register it
LPS-41340 No logic changes - move code to new PortletDataHandler
LPS-41340 Apply changes in new portlet data handler class
LPS-41340 Apply changes to Layout/PortletExporter/Importer classes, PDC and adding a new portlet key
LPS-41340 Deprecating methods
LPS-41340 missing deprecation comment - it has been deprecated since '12