a funny bug about cluster redis "NewGR"

[ALEX-yinhao]

about cluster redis, if you have a password with redis, one funny bug will be happend.
here is the code about broker NewGR and backend NewGR

broker NewGR :

var password string
parts := strings.Split(addrs[0], "@")
if len(parts) >= 2 {
	// with password
	password = strings.Join(parts[:len(parts)-1], "@")
	addrs[0] = parts[len(parts)-1] // addr is the last one without @
}

backend NewGR

parts := strings.Split(addrs[0], "@")
if len(parts) >= 2 {
	// with passwrod
	b.password = strings.Join(parts[:len(parts)-1], "@")
	addrs[0] = parts[len(parts)-1] // addr is the last one without @
}

the cluster redis example

cnf := &machineryConfig.Config{
	DefaultQueue:    "machinery_tasks",
	ResultsExpireIn: 3600,
	Redis: &machineryConfig.RedisConfig{
		MaxIdle:                300,
		IdleTimeout:            240,
		ReadTimeout:            15,
		WriteTimeout:           15,
		ConnectTimeout:         15,
		NormalTasksPollPeriod:  1000,
		DelayedTasksPollPeriod: 500,
	},
}

if config.Type == "cluster" {
	addrs := make([]string, 0)
	for k, v := range config.ClusterAddrs {
		if k == 0 {
			addrs = append(addrs, config.Password+"@"+v)
		} else {
			addrs = append(addrs, v)
		}
	}
	fmt.Println(addrs)
	cnf.Redis.ClusterMode = true
	broker := redisbroker.NewGR(cnf, addrs, 0)
	backend := redisbackend.NewGR(cnf, addrs, 0)
	lock := eagerlock.New()
	server = machinery.NewServerWithBrokerBackendLock(cnf, broker, backend, lock)
  }

if we dont see the code of NewGR , we will use redis addrs in broker and backend.
But in the borker NewGR, it will change the array "addrs" ,cut the password of redis, and then the backend NewGR cant find the password in the array "addrs"

also, the password only cut the first one of the "addrs".