added timeout to name server helper script
added timeout to name server helper script

cuihaoliang/zerovm,cuihaoliang/zerovm,zerovm/zerovm,zerovm/zerovm,zerovm/zerovm,cuihaoliang/zerovm,cuihaoliang/zerovm,zerovm/zerovm,zerovm/zerovm,cuihaoliang/zerovm