Fix output_shapes property of BucketingModule (#5030)
Fix output_shapes property of BucketingModule (#5030)


saurabh3949/mxnet,szha/mxnet,hpi-xnor/BMXNet,hpi-xnor/BMXNet,apache/incubator-mxnet,rishita/mxnet,xcgoner/dist-mxnet,sxjscience/mxnet,rishita/mxnet,ykim362/mxnet,precedenceguo/mxnet,DR08/mxnet,ForkedReposBak/mxnet,DickJC123/mxnet,crazy-cat/incubator-mxnet,tlby/mxnet,xcgoner/dist-mxnet,rishita/mxnet,rahul003/mxnet,rahul003/mxnet,gautamkmr/incubator-mxnet,yajiedesign/mxnet,sergeykolychev/mxnet,ykim362/mxnet,jermainewang/mxnet,arank/mxnet,pluskid/mxnet,ShownX/incubator-mxnet,pluskid/mxnet,stefanhenneking/mxnet,sergeykolychev/mxnet,fullfanta/mxnet,zhreshold/mxnet,Prasad9/incubator-mxnet,TuSimple/mxnet,solin319/incubator-mxnet,jamesliu/mxnet,jiajiechen/mxnet,hesseltuinhof/mxnet,madjam/mxnet,yuruofeifei/mxnet,jamesliu/mxnet,jamesliu/mxnet,leezu/mxnet,likelyzhao/mxnet,szha/mxnet,LinkHS/incubator-mxnet,ShownX/incubator-mxnet,szha/mxnet,gautamkmr/incubator-mxnet,ForkedReposBak/mxnet,stefanhenneking/mxnet,fullfanta/mxnet,sergeykolychev/mxnet,pluskid/mxnet,Mega-DatA-Lab/mxnet,fullfanta/mxnet,LinkHS/incubator-mxnet,ZihengJiang/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,Ldpe2G/mxnet,sxjscience/mxnet,danithaca/mxnet,formath/mxnet,kkk669/mxnet,jiajiechen/mxnet,jennyzhang0215/incubator-mxnet,ForkedReposBak/mxnet,indhub/mxnet,xcgoner/dist-mxnet,apache/incubator-mxnet,tlby/mxnet,gautamkmr/incubator-mxnet,yuruofeifei/mxnet,larroy/mxnet,navrasio/mxnet,sxjscience/mxnet,eric-haibin-lin/mxnet,TuSimple/mxnet,nicklhy/mxnet,tornadomeet/mxnet,danithaca/mxnet,DR08/mxnet,Ldpe2G/mxnet,hpi-xnor/BMXNet,kevinthesun/mxnet,TuSimple/mxnet,hesseltuinhof/mxnet,tornadomeet/mxnet,lxn2/mxnet,Ldpe2G/mxnet,solin319/incubator-mxnet,Prasad9/incubator-mxnet,ykim362/mxnet,reminisce/mxnet,Prasad9/incubator-mxnet,precedenceguo/mxnet,yajiedesign/mxnet,precedenceguo/mxnet,danithaca/mxnet,leezu/mxnet,zhreshold/mxnet,kevinthesun/mxnet,likelyzhao/mxnet,TuSimple/mxnet,jennyzhang0215/incubator-mxnet,navrasio/mxnet,hpi-xnor/BMXNet,ZihengJiang/mxnet,CodingCat/mxnet,EvanzzzZ/mxnet,sxjscience/mxnet,wangyum/mxnet,EvanzzzZ/mxnet,tornadomeet/mxnet,stefanhenneking/mxnet,kevinthesun/mxnet,saurabh3949/mxnet,ptrendx/mxnet,thirdwing/mxnet,hpi-xnor/BMXNet,jennyzhang0215/incubator-mxnet,piiswrong/mxnet,xcgoner/dist-mxnet,EvanzzzZ/mxnet,hotpxl/mxnet,jermainewang/mxnet,coder-james/mxnet,hotpxl/mxnet,Ldpe2G/mxnet,arikpoz/mxnet,apaleyes/mxnet,jermainewang/mxnet,leezu/mxnet,madjam/mxnet,smolix/incubator-mxnet,madjam/mxnet,luoyetx/mxnet,dmlc/mxnet,TuSimple/mxnet,CodingCat/mxnet,Northrend/mxnet,coder-james/mxnet,reminisce/mxnet,lxn2/mxnet,yuruofeifei/mxnet,LinkHS/incubator-mxnet,tlby/mxnet,LinkHS/incubator-mxnet,xcgoner/dist-mxnet,kkk669/mxnet,rishita/mxnet,ShownX/incubator-mxnet,mbaijal/incubator-mxnet,navrasio/mxnet,szha/mxnet,weleen/mxnet,Northrend/mxnet,yuruofeifei/mxnet,smolix/incubator-mxnet,coder-james/mxnet,mbaijal/incubator-mxnet,arank/mxnet,arank/mxnet,yajiedesign/mxnet,arikpoz/mxnet,arank/mxnet,apache/incubator-mxnet,yajiedesign/mxnet,tornadomeet/mxnet,solin319/incubator-mxnet,LinkHS/incubator-mxnet,hotpxl/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,Prasad9/incubator-mxnet,jiajiechen/mxnet,thirdwing/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,DR08/mxnet,hesseltuinhof/mxnet,ZihengJiang/mxnet,ShownX/incubator-mxnet,jamesliu/mxnet,Mega-DatA-Lab/mxnet,reminisce/mxnet,sergeykolychev/mxnet,arikpoz/mxnet,TuSimple/mxnet,kevinthesun/mxnet,madjam/mxnet,arikpoz/mxnet,arikpoz/mxnet,solin319/incubator-mxnet,leezu/mxnet,Northrend/mxnet,szha/mxnet,fullfanta/mxnet,gautamkmr/incubator-mxnet,apaleyes/mxnet,leezu/mxnet,tlby/mxnet,xcgoner/dist-mxnet,piiswrong/mxnet,Mega-DatA-Lab/mxnet,kkk669/mxnet,gautamkmr/incubator-mxnet,xcgoner/dist-mxnet,luoyetx/mxnet,leezu/mxnet,ykim362/mxnet,eric-haibin-lin/mxnet,reminisce/mxnet,saurabh3949/mxnet,stefanhenneking/mxnet,crazy-cat/incubator-mxnet,sergeykolychev/mxnet,madjam/mxnet,fullfanta/mxnet,piiswrong/mxnet,navrasio/mxnet,formath/mxnet,ptrendx/mxnet,Ldpe2G/mxnet,apaleyes/mxnet,mbaijal/incubator-mxnet,reminisce/mxnet,kkk669/mxnet,wangyum/mxnet,eric-haibin-lin/mxnet,zhreshold/mxnet,ZihengJiang/mxnet,formath/mxnet,wangyum/mxnet,mbaijal/incubator-mxnet,rahul003/mxnet,vikingMei/mxnet,dmlc/mxnet,arank/mxnet,coder-james/mxnet,leezu/mxnet,crazy-cat/incubator-mxnet,indhub/mxnet,eric-haibin-lin/mxnet,navrasio/mxnet,fullfanta/mxnet,jiajiechen/mxnet,thirdwing/mxnet,piiswrong/mxnet,tlby/mxnet,TuSimple/mxnet,hotpxl/mxnet,wangyum/mxnet,luoyetx/mxnet,jamesliu/mxnet,solin319/incubator-mxnet,weleen/mxnet,hesseltuinhof/mxnet,smolix/incubator-mxnet,Ldpe2G/mxnet,ptrendx/mxnet,hotpxl/mxnet,EvanzzzZ/mxnet,yajiedesign/mxnet,ptrendx/mxnet,likelyzhao/mxnet,apaleyes/mxnet,antoan2/incubator-mxnet,rahul003/mxnet,Prasad9/incubator-mxnet,lxn2/mxnet,lxn2/mxnet,rahul003/mxnet,stefanhenneking/mxnet,sergeykolychev/mxnet,hotpxl/mxnet,yajiedesign/mxnet,piiswrong/mxnet,navrasio/mxnet,rahul003/mxnet,jamesliu/mxnet,ForkedReposBak/mxnet,gautamkmr/incubator-mxnet,DR08/mxnet,Northrend/mxnet,wangyum/mxnet,yajiedesign/mxnet,TuSimple/mxnet,antoan2/incubator-mxnet,Northrend/mxnet,DR08/mxnet,arikpoz/mxnet,weleen/mxnet,coder-james/mxnet,formath/mxnet,LinkHS/incubator-mxnet,sergeykolychev/mxnet,ShownX/incubator-mxnet,dmlc/mxnet,Mega-DatA-Lab/mxnet,CodingCat/mxnet,nicklhy/mxnet,madjam/mxnet,hpi-xnor/BMXNet,antoan2/incubator-mxnet,precedenceguo/mxnet,thirdwing/mxnet,jennyzhang0215/incubator-mxnet,crazy-cat/incubator-mxnet,EvanzzzZ/mxnet,ptrendx/mxnet,EvanzzzZ/mxnet,gautamkmr/incubator-mxnet,jamesliu/mxnet,apaleyes/mxnet,jennyzhang0215/incubator-mxnet,navrasio/mxnet,sxjscience/mxnet,hesseltuinhof/mxnet,navrasio/mxnet,antoan2/incubator-mxnet,hesseltuinhof/mxnet,tlby/mxnet,reminisce/mxnet,antoan2/incubator-mxnet,ZihengJiang/mxnet,leezu/mxnet,precedenceguo/mxnet,Mega-DatA-Lab/mxnet,ZihengJiang/mxnet,yuruofeifei/mxnet,sxjscience/mxnet,jennyzhang0215/incubator-mxnet,ykim362/mxnet,LinkHS/incubator-mxnet,solin319/incubator-mxnet,smolix/incubator-mxnet,piiswrong/mxnet,leezu/mxnet,wangyum/mxnet,jennyzhang0215/incubator-mxnet,rishita/mxnet,jermainewang/mxnet,weleen/mxnet,szha/mxnet,pluskid/mxnet,tlby/mxnet,dmlc/mxnet,tlby/mxnet,smolix/incubator-mxnet,smolix/incubator-mxnet,pluskid/mxnet,saurabh3949/mxnet,piiswrong/mxnet,szha/mxnet,arank/mxnet,Mega-DatA-Lab/mxnet,wangyum/mxnet,nicklhy/mxnet,hpi-xnor/BMXNet,jermainewang/mxnet,ptrendx/mxnet,thirdwing/mxnet,ForkedReposBak/mxnet,mbaijal/incubator-mxnet,madjam/mxnet,luoyetx/mxnet,yuruofeifei/mxnet,DickJC123/mxnet,ptrendx/mxnet,crazy-cat/incubator-mxnet,CodingCat/mxnet,jermainewang/mxnet,solin319/incubator-mxnet,coder-james/mxnet,antoan2/incubator-mxnet,formath/mxnet,navrasio/mxnet,rahul003/mxnet,gautamkmr/incubator-mxnet,likelyzhao/mxnet,jiajiechen/mxnet,pluskid/mxnet,larroy/mxnet,lxn2/mxnet,Ldpe2G/mxnet,ShownX/incubator-mxnet,eric-haibin-lin/mxnet,weleen/mxnet,CodingCat/mxnet,jamesliu/mxnet,indhub/mxnet,jermainewang/mxnet,kevinthesun/mxnet,nicklhy/mxnet,hesseltuinhof/mxnet,luoyetx/mxnet,ForkedReposBak/mxnet,stefanhenneking/mxnet,jennyzhang0215/incubator-mxnet,TuSimple/mxnet,arikpoz/mxnet,danithaca/mxnet,antoan2/incubator-mxnet,fullfanta/mxnet,larroy/mxnet,kevinthesun/mxnet,gautamkmr/incubator-mxnet,formath/mxnet,hotpxl/mxnet,Ldpe2G/mxnet,zhreshold/mxnet,CodingCat/mxnet,DickJC123/mxnet,sxjscience/mxnet,lxn2/mxnet,tlby/mxnet,jamesliu/mxnet,larroy/mxnet,luoyetx/mxnet,antoan2/incubator-mxnet,weleen/mxnet,Northrend/mxnet,apaleyes/mxnet,ykim362/mxnet,vikingMei/mxnet,coder-james/mxnet,Prasad9/incubator-mxnet,Mega-DatA-Lab/mxnet,jermainewang/mxnet,LinkHS/incubator-mxnet,hotpxl/mxnet,saurabh3949/mxnet,szha/mxnet,fullfanta/mxnet,indhub/mxnet,ykim362/mxnet,stefanhenneking/mxnet,ShownX/incubator-mxnet,precedenceguo/mxnet,smolix/incubator-mxnet,smolix/incubator-mxnet,mbaijal/incubator-mxnet,DickJC123/mxnet,zhreshold/mxnet,pluskid/mxnet,Northrend/mxnet,lxn2/mxnet,yuruofeifei/mxnet,indhub/mxnet,solin319/incubator-mxnet,vikingMei/mxnet,ptrendx/mxnet,dmlc/mxnet,antoan2/incubator-mxnet,yuruofeifei/mxnet,smolix/incubator-mxnet,ForkedReposBak/mxnet,wangyum/mxnet,ptrendx/mxnet,hesseltuinhof/mxnet,likelyzhao/mxnet,formath/mxnet,larroy/mxnet,madjam/mxnet,xcgoner/dist-mxnet,kkk669/mxnet,ZihengJiang/mxnet,Mega-DatA-Lab/mxnet,mbaijal/incubator-mxnet,crazy-cat/incubator-mxnet,saurabh3949/mxnet,hotpxl/mxnet,dmlc/mxnet,kkk669/mxnet,jiajiechen/mxnet,tlby/mxnet,hpi-xnor/BMXNet,luoyetx/mxnet,larroy/mxnet,yajiedesign/mxnet,danithaca/mxnet,kkk669/mxnet,indhub/mxnet,CodingCat/mxnet,yuruofeifei/mxnet,coder-james/mxnet,LinkHS/incubator-mxnet,vikingMei/mxnet,piiswrong/mxnet,xcgoner/dist-mxnet,DR08/mxnet,Ldpe2G/mxnet,vikingMei/mxnet,likelyzhao/mxnet,saurabh3949/mxnet,vikingMei/mxnet,weleen/mxnet,sergeykolychev/mxnet,rishita/mxnet,eric-haibin-lin/mxnet,hesseltuinhof/mxnet,arank/mxnet,DR08/mxnet,saurabh3949/mxnet,ShownX/incubator-mxnet,wangyum/mxnet,Northrend/mxnet,EvanzzzZ/mxnet,ZihengJiang/mxnet,Prasad9/incubator-mxnet,rishita/mxnet,pluskid/mxnet,zhreshold/mxnet,arikpoz/mxnet,CodingCat/mxnet,dmlc/mxnet,vikingMei/mxnet,ykim362/mxnet,stefanhenneking/mxnet,reminisce/mxnet,rishita/mxnet,weleen/mxnet,vikingMei/mxnet,Mega-DatA-Lab/mxnet,jiajiechen/mxnet,zhreshold/mxnet,nicklhy/mxnet,Prasad9/incubator-mxnet,larroy/mxnet,precedenceguo/mxnet,tornadomeet/mxnet,lxn2/mxnet,rishita/mxnet,kevinthesun/mxnet,coder-james/mxnet,tornadomeet/mxnet,indhub/mxnet,pluskid/mxnet,precedenceguo/mxnet,thirdwing/mxnet,dmlc/mxnet,nicklhy/mxnet,jennyzhang0215/incubator-mxnet,reminisce/mxnet,arank/mxnet,eric-haibin-lin/mxnet,jiajiechen/mxnet,dmlc/mxnet,tornadomeet/mxnet,arank/mxnet,sergeykolychev/mxnet,ForkedReposBak/mxnet,thirdwing/mxnet,solin319/incubator-mxnet,jermainewang/mxnet,szha/mxnet,kevinthesun/mxnet,rahul003/mxnet,Prasad9/incubator-mxnet,danithaca/mxnet,weleen/mxnet,apaleyes/mxnet,larroy/mxnet,Northrend/mxnet,thirdwing/mxnet,madjam/mxnet,apaleyes/mxnet,TuSimple/mxnet,luoyetx/mxnet,ShownX/incubator-mxnet,danithaca/mxnet,mbaijal/incubator-mxnet,indhub/mxnet,formath/mxnet,tornadomeet/mxnet,vikingMei/mxnet,kkk669/mxnet,arikpoz/mxnet,larroy/mxnet,apaleyes/mxnet,indhub/mxnet,hpi-xnor/BMXNet,nicklhy/mxnet,luoyetx/mxnet,tornadomeet/mxnet,jiajiechen/mxnet,sxjscience/mxnet,kkk669/mxnet,saurabh3949/mxnet,piiswrong/mxnet,DR08/mxnet,stefanhenneking/mxnet,crazy-cat/incubator-mxnet,formath/mxnet,likelyzhao/mxnet,nicklhy/mxnet,danithaca/mxnet,zhreshold/mxnet,ptrendx/mxnet,EvanzzzZ/mxnet,likelyzhao/mxnet,reminisce/mxnet,ZihengJiang/mxnet,crazy-cat/incubator-mxnet,likelyzhao/mxnet,nicklhy/mxnet,sxjscience/mxnet,precedenceguo/mxnet,CodingCat/mxnet,EvanzzzZ/mxnet,lxn2/mxnet,kevinthesun/mxnet,crazy-cat/incubator-mxnet,reminisce/mxnet,ykim362/mxnet,DR08/mxnet,fullfanta/mxnet,thirdwing/mxnet,apache/incubator-mxnet,danithaca/mxnet