fix vol2col_test according to new CopyFrom
fix vol2col_test according to new CopyFrom

pengli09/Paddle,pengli09/Paddle,putcn/Paddle,lcy-seso/Paddle,pkuyym/Paddle,pengli09/Paddle,jacquesqiao/Paddle,QiJune/Paddle,tensor-tang/Paddle,pkuyym/Paddle,reyoung/Paddle,putcn/Paddle,baidu/Paddle,QiJune/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,pengli09/Paddle,pengli09/Paddle,baidu/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,QiJune/Paddle,lcy-seso/Paddle,pkuyym/Paddle,chengduoZH/Paddle,jacquesqiao/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,Canpio/Paddle,chengduoZH/Paddle,luotao1/Paddle,pkuyym/Paddle,reyoung/Paddle,putcn/Paddle,luotao1/Paddle,putcn/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,Canpio/Paddle,QiJune/Paddle,pengli09/Paddle,Canpio/Paddle,Canpio/Paddle,reyoung/Paddle,lcy-seso/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,chengduoZH/Paddle,reyoung/Paddle,putcn/Paddle,jacquesqiao/Paddle,pengli09/Paddle,QiJune/Paddle,luotao1/Paddle,Canpio/Paddle,Canpio/Paddle,lcy-seso/Paddle,baidu/Paddle,tensor-tang/Paddle,chengduoZH/Paddle,luotao1/Paddle,baidu/Paddle,pkuyym/Paddle,pkuyym/Paddle,putcn/Paddle,jacquesqiao/Paddle,QiJune/Paddle,baidu/Paddle,Canpio/Paddle,tensor-tang/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,pengli09/Paddle,reyoung/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,tensor-tang/Paddle