change type of BN's 'mean' and 'variance' from persistable variable to Parameter
change type of BN's 'mean' and 'variance' from persistable variable to Parameter

luotao1/Paddle,reyoung/Paddle,reyoung/Paddle,putcn/Paddle,pkuyym/Paddle,pkuyym/Paddle,QiJune/Paddle,putcn/Paddle,pkuyym/Paddle,Canpio/Paddle,jacquesqiao/Paddle,PaddlePaddle/Paddle,reyoung/Paddle,tensor-tang/Paddle,putcn/Paddle,reyoung/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,putcn/Paddle,QiJune/Paddle,chengduoZH/Paddle,QiJune/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,putcn/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,QiJune/Paddle,lcy-seso/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,luotao1/Paddle,putcn/Paddle,Canpio/Paddle,luotao1/Paddle,lcy-seso/Paddle,luotao1/Paddle,Canpio/Paddle,Canpio/Paddle,luotao1/Paddle,lcy-seso/Paddle,baidu/Paddle,baidu/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,tensor-tang/Paddle,pkuyym/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,Canpio/Paddle,lcy-seso/Paddle,baidu/Paddle,QiJune/Paddle,baidu/Paddle,jacquesqiao/Paddle,tensor-tang/Paddle,jacquesqiao/Paddle,QiJune/Paddle,luotao1/Paddle,tensor-tang/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,baidu/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,Canpio/Paddle