routerrpc: update final cltv delta default

The default was increased for the main sendpayment RPC in commit
d3fa9767a9. This commit sets the
same default for QueryRoutes, routerrpc.SendPayment and
router.EstimateRouteFee.

rpcserver.go

@@ -562,11 +562,12 @@ func newRPCServer(s *server, macService *macaroons.Service,
 
 			return info.NodeKey1Bytes, info.NodeKey2Bytes, nil
 		},
-		FindRoute:        s.chanRouter.FindRoute,
-		MissionControl:   s.missionControl,
-		ActiveNetParams:  activeNetParams.Params,
-		Tower:            s.controlTower,
-		MaxTotalTimelock: cfg.MaxOutgoingCltvExpiry,
+		FindRoute:             s.chanRouter.FindRoute,
+		MissionControl:        s.missionControl,
+		ActiveNetParams:       activeNetParams.Params,
+		Tower:                 s.controlTower,
+		MaxTotalTimelock:      cfg.MaxOutgoingCltvExpiry,
+		DefaultFinalCltvDelta: uint16(cfg.Bitcoin.TimeLockDelta),
 	}
 
 	genInvoiceFeatures := func() *lnwire.FeatureVector {