add backward compatibility to Port.label_range/Port.vlan_range

src/sdx_pce/topology/temanager.py

@@ -145,7 +145,7 @@ def _update_vlan_tags_table(self, domain_name: str, port_map: dict):
                 # port itself (v1), or from the services attached to it (v2).
                 label_range = self.get_port_obj_services_label_range(port)
                 if label_range is None:
-                    label_range = port.label_range
+                    label_range = port.vlan_range
 
                 # TODO: why is label_range sometimes None, and what to
                 # do when that happens?