Judge add rpc timeout

[qlyzpqz]

open-falcon-archive/judge#6

为了解决这个issure的问题，给RPC调用增加了一个超时方法，可以将hbs改用一个fake_server来进行测试

package main

import (
	"log"
	"net"
	"time"
)

func serve(conn *net.Conn) {

	time.Sleep(time.Duration(1000) * time.Second)
}

func main() {

	listener, err := net.Listen("tcp", "0.0.0.0:6030")
	if err != nil {

		log.Println("[ERROR] listen on :6030 failed,", err)
		return
	}
	for {

		conn, err := listener.Accept()
		if err != nil {

			log.Println("[ERROR] accept an new connection failed,", err)
			break
		}
		go serve(&conn)
	}
}