Start branch for 4.0.0 release

src/main/resources/hapi.properties

@@ -23,6 +23,7 @@ allow_override_default_search_params=true
 allow_contains_searches=true
 allow_multiple_delete=true
 allow_external_references=true
+allow_cascading_deletes=true
 allow_placeholder_references=true
 expunge_enabled=true
 persistence_unit_name=HAPI_PU