server: better way to clean chainControl resources

In this commit the location of where chain control services
are stopped is shifted to be closer to the point they are started.
Stopping of two services: "wallet" and "feeEstimator" that are started
inside the "newChainControlFromConfig" was shifted from server.go to
the cleanup function.

In addition the chainView.Stop was also removed from the server.Stop as
it is already handled by the router, where it is being started.

lnd.go

@@ -545,7 +545,10 @@ func Main(cfg *Config, lisCfg ListenerCfg, interceptor signal.Interceptor) error
 		FeeURL:                      cfg.FeeURL,
 	}
 
-	activeChainControl, err := chainreg.NewChainControl(chainControlCfg)
+	activeChainControl, cleanup, err := chainreg.NewChainControl(chainControlCfg)
+	if cleanup != nil {
+		defer cleanup()
+	}
 	if err != nil {
 		err := fmt.Errorf("unable to create chain control: %v", err)
 		ltndLog.Error(err)