add num_group argument in convert_symbol (#6380)
add num_group argument in convert_symbol (#6380)


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