fix updateVO method

src/main/java/org/gcube/informationsystem/publisher/RegistryPublisherImpl.java

@@ -239,8 +239,8 @@ public class RegistryPublisherImpl implements RegistryPublisher {
 				vosScopes.remove(currentVO);
 	// in this case it is a root-vo scope so we need to update the resource only at root-vo level	
 			}else{
-				RegistryStub stub = getRegistryStub();
-			 	createResource(resource, currentVO, stub);
+				ScopeProvider.instance.set(currentScope);
+				registryUpdate(resource, 0);
 			 	return resource;
 			}