fix test_layerHelpers unittest error
fix test_layerHelpers unittest error

Canpio/Paddle,putcn/Paddle,reyoung/Paddle,pengli09/Paddle,luotao1/Paddle,pkuyym/Paddle,putcn/Paddle,emailweixu/Paddle,yu239/Paddle,QiJune/Paddle,gangliao/Paddle,pengli09/Paddle,livc/Paddle,cxysteven/Paddle,reyoung/Paddle,wen-bo-yang/Paddle,wen-bo-yang/Paddle,lispc/Paddle,putcn/Paddle,pengli09/Paddle,hedaoyuan/Paddle,luotao1/Paddle,zhouxiao-coder/Paddle,alvations/Paddle,livc/Paddle,reyoung/Paddle,zhouxiao-coder/Paddle,hedaoyuan/Paddle,lispc/Paddle,wen-bo-yang/Paddle,PaddlePaddle/Paddle,lispc/Paddle,PaddlePaddle/Paddle,dayhaha/Paddle,beckett1124/Paddle,chengduoZH/Paddle,lcy-seso/Paddle,lispc/Paddle,QiJune/Paddle,emailweixu/Paddle,PaddlePaddle/Paddle,pkuyym/Paddle,gangliao/Paddle,qingqing01/Paddle,alvations/Paddle,yu239/Paddle,Canpio/Paddle,lcy-seso/Paddle,baidu/Paddle,dayhaha/Paddle,emailweixu/Paddle,lispc/Paddle,qingqing01/Paddle,beckett1124/Paddle,pkuyym/Paddle,gangliao/Paddle,hedaoyuan/Paddle,tensor-tang/Paddle,hedaoyuan/Paddle,PaddlePaddle/Paddle,jacquesqiao/Paddle,cxysteven/Paddle,luotao1/Paddle,cxysteven/Paddle,beckett1124/Paddle,Canpio/Paddle,jacquesqiao/Paddle,cxysteven/Paddle,luotao1/Paddle,tensor-tang/Paddle,Canpio/Paddle,hedaoyuan/Paddle,QiJune/Paddle,pengli09/Paddle,helinwang/Paddle,wen-bo-yang/Paddle,chengduoZH/Paddle,qingqing01/Paddle,livc/Paddle,gangliao/Paddle,gangliao/Paddle,lcy-seso/Paddle,emailweixu/Paddle,zhouxiao-coder/Paddle,gangliao/Paddle,yu239/Paddle,livc/Paddle,emailweixu/Paddle,lispc/Paddle,beckett1124/Paddle,yu239/Paddle,pkuyym/Paddle,reyoung/Paddle,pkuyym/Paddle,cxysteven/Paddle,Canpio/Paddle,wen-bo-yang/Paddle,chengduoZH/Paddle,jacquesqiao/Paddle,helinwang/Paddle,tensor-tang/Paddle,jacquesqiao/Paddle,putcn/Paddle,chengduoZH/Paddle,zhouxiao-coder/Paddle,putcn/Paddle,pengli09/Paddle,alvations/Paddle,luotao1/Paddle,beckett1124/Paddle,pengli09/Paddle,helinwang/Paddle,baidu/Paddle,emailweixu/Paddle,helinwang/Paddle,baidu/Paddle,tensor-tang/Paddle,livc/Paddle,lispc/Paddle,dayhaha/Paddle,emailweixu/Paddle,lcy-seso/Paddle,gangliao/Paddle,helinwang/Paddle,lcy-seso/Paddle,lcy-seso/Paddle,yu239/Paddle,alvations/Paddle,hedaoyuan/Paddle,jacquesqiao/Paddle,cxysteven/Paddle,livc/Paddle,QiJune/Paddle,beckett1124/Paddle,putcn/Paddle,pengli09/Paddle,reyoung/Paddle,livc/Paddle,yu239/Paddle,luotao1/Paddle,PaddlePaddle/Paddle,wen-bo-yang/Paddle,pengli09/Paddle,PaddlePaddle/Paddle,luotao1/Paddle,pkuyym/Paddle,helinwang/Paddle,reyoung/Paddle,Canpio/Paddle,cxysteven/Paddle,QiJune/Paddle,jacquesqiao/Paddle,QiJune/Paddle,qingqing01/Paddle,helinwang/Paddle,dayhaha/Paddle,Canpio/Paddle,tensor-tang/Paddle,baidu/Paddle,dayhaha/Paddle,PaddlePaddle/Paddle,zhouxiao-coder/Paddle,Canpio/Paddle,yu239/Paddle,beckett1124/Paddle,dayhaha/Paddle,dayhaha/Paddle,qingqing01/Paddle,alvations/Paddle,hedaoyuan/Paddle,zhouxiao-coder/Paddle,zhouxiao-coder/Paddle,chengduoZH/Paddle,yu239/Paddle,wen-bo-yang/Paddle,lispc/Paddle,baidu/Paddle,hedaoyuan/Paddle