LPS-43907 Implement global scope related methods to SMDHs for asset category and vocabulary
LPS-43907 Update tests for asset category export/import
LPS-43907 DLFileShortcut has no categories or tags on it's own, it's automatically inherited from the file entry always
LPS-43907 Refactoring BaseSMDHTestCase to use AssetTestUtil
LPS-43907 Consistent naming