routing+server: let ForAllOutgoingChannels take a context

And so, remove a previously added context.TODO

routing/localchans/manager.go

@@ -40,7 +40,8 @@ type Manager struct {
 
 	// ForAllOutgoingChannels is required to iterate over all our local
 	// channels. The ChannelEdgePolicy parameter may be nil.
-	ForAllOutgoingChannels func(cb func(*models.ChannelEdgeInfo,
+	ForAllOutgoingChannels func(ctx context.Context,
+		cb func(*models.ChannelEdgeInfo,
 			*models.ChannelEdgePolicy) error) error
 
 	// FetchChannel is used to query local channel parameters. Optionally an
@@ -151,7 +152,7 @@ func (r *Manager) UpdatePolicy(ctx context.Context,
 	// Next, we'll loop over all the outgoing channels the router knows of.
 	// If we have a filter then we'll only collect those channels, otherwise
 	// we'll collect them all.
-	err := r.ForAllOutgoingChannels(processChan)
+	err := r.ForAllOutgoingChannels(ctx, processChan)
 	if err != nil {
 		return nil, err
 	}

routing/localchans/manager_test.go

@@ -123,7 +123,8 @@ func TestManager(t *testing.T) {
 		return nil
 	}
 
-	forAllOutgoingChannels := func(cb func(*models.ChannelEdgeInfo,
+	forAllOutgoingChannels := func(_ context.Context,
+		cb func(*models.ChannelEdgeInfo,
 			*models.ChannelEdgePolicy) error) error {
 
 		for _, c := range channelSet {

server.go

@@ -1252,11 +1252,10 @@ func newServer(ctx context.Context, cfg *Config, listenAddrs []net.Addr,
 	s.localChanMgr = &localchans.Manager{
 		SelfPub:              nodeKeyDesc.PubKey,
 		DefaultRoutingPolicy: cc.RoutingPolicy,
-		ForAllOutgoingChannels: func(cb func(*models.ChannelEdgeInfo,
+		ForAllOutgoingChannels: func(ctx context.Context,
+			cb func(*models.ChannelEdgeInfo,
 				*models.ChannelEdgePolicy) error) error {
 
-			ctx := context.TODO()
-
 			return s.graphDB.ForEachNodeChannel(ctx, selfVertex,
 				func(c *models.ChannelEdgeInfo,
 					e *models.ChannelEdgePolicy,