fix transport options

test/integration/nucleusIntegration_test.go

@@ -172,9 +172,9 @@ func TestGnmi_SubscribeIntegration(t *testing.T) {
 			name: "default",
 			fields: fields{
 				opt: &tpb.TransportOption{
-					Address:  "",
-					Username: "",
-					Password: "",
+					Address:  testAddress,
+					Username: testUsername,
+					Password: testPassword,
 					Tls:      false,
 					TransportOption: &tpb.TransportOption_GnmiTransportOption{
 						GnmiTransportOption: &tpb.GnmiTransportOption{