fix test memory leak
fix test memory leak

luotao1/Paddle,chengduoZH/Paddle,pkuyym/Paddle,yu239/Paddle,pengli09/Paddle,reyoung/Paddle,Canpio/Paddle,hedaoyuan/Paddle,pengli09/Paddle,lispc/Paddle,pkuyym/Paddle,luotao1/Paddle,hedaoyuan/Paddle,putcn/Paddle,pkuyym/Paddle,PaddlePaddle/Paddle,pengli09/Paddle,reyoung/Paddle,pengli09/Paddle,reyoung/Paddle,tensor-tang/Paddle,luotao1/Paddle,Canpio/Paddle,reyoung/Paddle,hedaoyuan/Paddle,chengduoZH/Paddle,Canpio/Paddle,jacquesqiao/Paddle,yu239/Paddle,putcn/Paddle,hedaoyuan/Paddle,lispc/Paddle,jacquesqiao/Paddle,chengduoZH/Paddle,lispc/Paddle,hedaoyuan/Paddle,hedaoyuan/Paddle,yu239/Paddle,putcn/Paddle,lispc/Paddle,tensor-tang/Paddle,QiJune/Paddle,lcy-seso/Paddle,yu239/Paddle,chengduoZH/Paddle,baidu/Paddle,PaddlePaddle/Paddle,putcn/Paddle,jacquesqiao/Paddle,Canpio/Paddle,pkuyym/Paddle,lispc/Paddle,tensor-tang/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,reyoung/Paddle,QiJune/Paddle,Canpio/Paddle,tensor-tang/Paddle,luotao1/Paddle,pengli09/Paddle,pengli09/Paddle,PaddlePaddle/Paddle,putcn/Paddle,Canpio/Paddle,PaddlePaddle/Paddle,yu239/Paddle,PaddlePaddle/Paddle,lcy-seso/Paddle,hedaoyuan/Paddle,lispc/Paddle,putcn/Paddle,yu239/Paddle,lcy-seso/Paddle,PaddlePaddle/Paddle,baidu/Paddle,baidu/Paddle,lcy-seso/Paddle,QiJune/Paddle,jacquesqiao/Paddle,Canpio/Paddle,luotao1/Paddle,tensor-tang/Paddle,lispc/Paddle,chengduoZH/Paddle,pkuyym/Paddle,pengli09/Paddle,baidu/Paddle,QiJune/Paddle,pkuyym/Paddle,yu239/Paddle,Canpio/Paddle,lcy-seso/Paddle,pengli09/Paddle,lispc/Paddle,luotao1/Paddle,hedaoyuan/Paddle,QiJune/Paddle,baidu/Paddle,luotao1/Paddle,jacquesqiao/Paddle,yu239/Paddle,QiJune/Paddle,lcy-seso/Paddle,reyoung/Paddle