bug fix:  the twemproxy password judge is wrong
bug fix:  the twemproxy password judge is wrong

zhongliangkang/twemproxy41,zhongliangkang/twemproxy41,zhongliangkang/twemproxy41,zhongliangkang/twemproxy41,zhongliangkang/twemproxy41,zhongliangkang/twemproxy41