remotecommand: close resize channel for notification

Remotecommand package should notify executor by closing resizeChan.

Signed-off-by: Wei Fu <fuweid89@gmail.com>

pkg/kubelet/server/remotecommand/httpstream.go

@@ -411,6 +411,7 @@ func (*v1ProtocolHandler) supportsTerminalResizing() bool { return false }
 
 func handleResizeEvents(stream io.Reader, channel chan<- remotecommand.TerminalSize) {
 	defer runtime.HandleCrash()
+	defer close(channel)
 
 	decoder := json.NewDecoder(stream)
 	for {