Fix recursive scan

concessioni-lifecycle/src/main/java/org/gcube/application/cms/concessioni/plugins/ConcessioniLifeCycleManager.java

@@ -266,6 +266,7 @@ public class ConcessioniLifeCycleManager extends Default3PhaseManager implements
     private static void scanRelation(ArrayList chain,RelationshipNavigationObject obj, boolean putBefore){
         if(putBefore)chain.add(0,obj.getTarget());
         else chain.add(obj.getTarget());
-        if(obj.getChildren()!=null && !obj.getChildren().isEmpty())scanRelation(chain,obj,putBefore);
+        if(obj.getChildren()!=null)
+            obj.getChildren().forEach(r-> scanRelation(chain,r,putBefore));
     }
 }