@Override
    public void cancel(String message, Throwable cause) {
        this.listener.onCancel(message, cause);
        super.cancel(message, cause);
    }
@author Woonduk Kang(emeroad)
@author jaehong.kim
grpc/src/main/java/com/navercorp/pinpoint/grpc/client/interceptor/DiscardClientCall.java