routerrpc+itest: make sure TrackPayments is compatible

This commit adds an itest case to make sure when the flag
`routerrpc.usestatusinitiated` is not set, the new status is not sent.

itest/list_on_test.go

@@ -490,6 +490,10 @@ var allTestCases = []*lntest.TestCase{
 		Name:     "trackpayments",
 		TestFunc: testTrackPayments,
 	},
+	{
+		Name:     "trackpayments compatible",
+		TestFunc: testTrackPaymentsCompatible,
+	},
 	{
 		Name:     "open channel fee policy",
 		TestFunc: testOpenChannelUpdateFeePolicy,