escape-mn-topo.nffg: add extarnal port info to domain field
escape-mn-topo.nffg: add extarnal port info to domain field

5GExchange/escape,hsnlab/escape,hsnlab/escape,5GExchange/escape,5GExchange/escape,hsnlab/escape,hsnlab/escape,5GExchange/escape,hsnlab/escape,5GExchange/escape,hsnlab/escape,5GExchange/escape