cleanup and rename provider to plugin

cmdlet/metadata/get_relationship.py

@@ -5,7 +5,7 @@ import sys
 
 from SYS.detail_view_helpers import create_detail_view, prepare_detail_metadata
 from SYS.logger import log
-from ProviderCore.registry import get_plugin
+from PluginCore.registry import get_plugin
 from SYS.result_table_helpers import add_row_columns
 from SYS.selection_builder import build_hash_store_selection
 from SYS.result_publication import publish_result_table