added check on root-vo scope

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

@@ -110,6 +110,11 @@ public class RegistryPublisherImpl implements RegistryPublisher {
 				RegistryStub stub = getRegistryStub();
 			 	createResource(resource, currentVO, stub);
 			 	vosScopes.remove(currentVO);
+			 //in this case it is a root-vo scope so we need to create the resource only at root-vo level	
+			}else{
+				RegistryStub stub = getRegistryStub();
+			 	createResource(resource, currentVO, stub);
+			 	return resource;
 			}
 			// update the resource for each VO
 			for (String voScope: vosScopes){