Revert "Kill running PR builds when a new build is triggered for the same PR (#8034)" (#8078)
Revert "Kill running PR builds when a new build is triggered for the same PR (#8034)" (#8078)

This reverts commit 4c0df6249d03841f5eb30e1428aa25fc230fed30.
ShownX/incubator-mxnet,Prasad9/incubator-mxnet,tornadomeet/mxnet,solin319/incubator-mxnet,precedenceguo/mxnet,yuruofeifei/mxnet,leezu/mxnet,Prasad9/incubator-mxnet,szha/mxnet,LinkHS/incubator-mxnet,kkk669/mxnet,madjam/mxnet,Prasad9/incubator-mxnet,crazy-cat/incubator-mxnet,Mega-DatA-Lab/mxnet,ykim362/mxnet,Northrend/mxnet,luoyetx/mxnet,precedenceguo/mxnet,piiswrong/mxnet,yuruofeifei/mxnet,yajiedesign/mxnet,reminisce/mxnet,dmlc/mxnet,reminisce/mxnet,fullfanta/mxnet,formath/mxnet,rahul003/mxnet,TuSimple/mxnet,hpi-xnor/BMXNet,CodingCat/mxnet,antoan2/incubator-mxnet,kkk669/mxnet,solin319/incubator-mxnet,LinkHS/incubator-mxnet,antoan2/incubator-mxnet,larroy/mxnet,tornadomeet/mxnet,wangyum/mxnet,yuruofeifei/mxnet,piiswrong/mxnet,leezu/mxnet,formath/mxnet,Mega-DatA-Lab/mxnet,szha/mxnet,crazy-cat/incubator-mxnet,crazy-cat/incubator-mxnet,vikingMei/mxnet,reminisce/mxnet,ShownX/incubator-mxnet,jiajiechen/mxnet,luoyetx/mxnet,wangyum/mxnet,jiajiechen/mxnet,Mega-DatA-Lab/mxnet,madjam/mxnet,jamesliu/mxnet,mbaijal/incubator-mxnet,luoyetx/mxnet,fullfanta/mxnet,antoan2/incubator-mxnet,tlby/mxnet,jiajiechen/mxnet,CodingCat/mxnet,navrasio/mxnet,larroy/mxnet,tornadomeet/mxnet,antoan2/incubator-mxnet,weleen/mxnet,LinkHS/incubator-mxnet,hpi-xnor/BMXNet,ShownX/incubator-mxnet,dmlc/mxnet,reminisce/mxnet,yajiedesign/mxnet,zhreshold/mxnet,fullfanta/mxnet,ForkedReposBak/mxnet,szha/mxnet,apache/incubator-mxnet,crazy-cat/incubator-mxnet,leezu/mxnet,tornadomeet/mxnet,Mega-DatA-Lab/mxnet,ShownX/incubator-mxnet,DickJC123/mxnet,ptrendx/mxnet,apache/incubator-mxnet,szha/mxnet,szha/mxnet,leezu/mxnet,zhreshold/mxnet,wangyum/mxnet,tlby/mxnet,Northrend/mxnet,jennyzhang0215/incubator-mxnet,precedenceguo/mxnet,zhreshold/mxnet,CodingCat/mxnet,eric-haibin-lin/mxnet,reminisce/mxnet,ptrendx/mxnet,piiswrong/mxnet,precedenceguo/mxnet,piiswrong/mxnet,jamesliu/mxnet,dmlc/mxnet,yajiedesign/mxnet,eric-haibin-lin/mxnet,ykim362/mxnet,rahul003/mxnet,leezu/mxnet,kkk669/mxnet,jiajiechen/mxnet,jermainewang/mxnet,larroy/mxnet,TuSimple/mxnet,tornadomeet/mxnet,vikingMei/mxnet,reminisce/mxnet,Prasad9/incubator-mxnet,yuruofeifei/mxnet,jermainewang/mxnet,Prasad9/incubator-mxnet,Prasad9/incubator-mxnet,leezu/mxnet,piiswrong/mxnet,hpi-xnor/BMXNet,dmlc/mxnet,luoyetx/mxnet,leezu/mxnet,CodingCat/mxnet,sxjscience/mxnet,larroy/mxnet,ykim362/mxnet,wangyum/mxnet,solin319/incubator-mxnet,dmlc/mxnet,yuruofeifei/mxnet,apache/incubator-mxnet,CodingCat/mxnet,vikingMei/mxnet,tlby/mxnet,ykim362/mxnet,ShownX/incubator-mxnet,antoan2/incubator-mxnet,mbaijal/incubator-mxnet,eric-haibin-lin/mxnet,wangyum/mxnet,ptrendx/mxnet,yuruofeifei/mxnet,madjam/mxnet,mbaijal/incubator-mxnet,Northrend/mxnet,yuruofeifei/mxnet,jermainewang/mxnet,sxjscience/mxnet,luoyetx/mxnet,Northrend/mxnet,fullfanta/mxnet,solin319/incubator-mxnet,fullfanta/mxnet,mbaijal/incubator-mxnet,precedenceguo/mxnet,vikingMei/mxnet,wangyum/mxnet,kkk669/mxnet,vikingMei/mxnet,yajiedesign/mxnet,jamesliu/mxnet,fullfanta/mxnet,eric-haibin-lin/mxnet,rahul003/mxnet,LinkHS/incubator-mxnet,ForkedReposBak/mxnet,rahul003/mxnet,tlby/mxnet,sxjscience/mxnet,indhub/mxnet,fullfanta/mxnet,ForkedReposBak/mxnet,kkk669/mxnet,DickJC123/mxnet,crazy-cat/incubator-mxnet,sxjscience/mxnet,formath/mxnet,rahul003/mxnet,zhreshold/mxnet,sxjscience/mxnet,madjam/mxnet,jennyzhang0215/incubator-mxnet,tlby/mxnet,rahul003/mxnet,Northrend/mxnet,dmlc/mxnet,rahul003/mxnet,fullfanta/mxnet,luoyetx/mxnet,ForkedReposBak/mxnet,Mega-DatA-Lab/mxnet,jiajiechen/mxnet,DickJC123/mxnet,apache/incubator-mxnet,zhreshold/mxnet,navrasio/mxnet,yajiedesign/mxnet,navrasio/mxnet,reminisce/mxnet,tlby/mxnet,jiajiechen/mxnet,ForkedReposBak/mxnet,jamesliu/mxnet,wangyum/mxnet,hpi-xnor/BMXNet,luoyetx/mxnet,jennyzhang0215/incubator-mxnet,yajiedesign/mxnet,LinkHS/incubator-mxnet,CodingCat/mxnet,larroy/mxnet,eric-haibin-lin/mxnet,indhub/mxnet,leezu/mxnet,indhub/mxnet,Mega-DatA-Lab/mxnet,crazy-cat/incubator-mxnet,jamesliu/mxnet,TuSimple/mxnet,antoan2/incubator-mxnet,weleen/mxnet,LinkHS/incubator-mxnet,Prasad9/incubator-mxnet,formath/mxnet,navrasio/mxnet,solin319/incubator-mxnet,Mega-DatA-Lab/mxnet,navrasio/mxnet,madjam/mxnet,jennyzhang0215/incubator-mxnet,TuSimple/mxnet,indhub/mxnet,ykim362/mxnet,TuSimple/mxnet,indhub/mxnet,hpi-xnor/BMXNet,weleen/mxnet,TuSimple/mxnet,reminisce/mxnet,jermainewang/mxnet,szha/mxnet,LinkHS/incubator-mxnet,formath/mxnet,crazy-cat/incubator-mxnet,tornadomeet/mxnet,madjam/mxnet,zhreshold/mxnet,ptrendx/mxnet,precedenceguo/mxnet,yajiedesign/mxnet,fullfanta/mxnet,kkk669/mxnet,madjam/mxnet,piiswrong/mxnet,Northrend/mxnet,jermainewang/mxnet,sxjscience/mxnet,yajiedesign/mxnet,ForkedReposBak/mxnet,larroy/mxnet,sxjscience/mxnet,kkk669/mxnet,ForkedReposBak/mxnet,piiswrong/mxnet,eric-haibin-lin/mxnet,jiajiechen/mxnet,leezu/mxnet,crazy-cat/incubator-mxnet,ykim362/mxnet,sxjscience/mxnet,CodingCat/mxnet,madjam/mxnet,Mega-DatA-Lab/mxnet,ptrendx/mxnet,tornadomeet/mxnet,solin319/incubator-mxnet,ptrendx/mxnet,weleen/mxnet,eric-haibin-lin/mxnet,kkk669/mxnet,jermainewang/mxnet,zhreshold/mxnet,weleen/mxnet,formath/mxnet,rahul003/mxnet,wangyum/mxnet,Prasad9/incubator-mxnet,ptrendx/mxnet,solin319/incubator-mxnet,weleen/mxnet,larroy/mxnet,CodingCat/mxnet,yuruofeifei/mxnet,reminisce/mxnet,szha/mxnet,zhreshold/mxnet,indhub/mxnet,jennyzhang0215/incubator-mxnet,mbaijal/incubator-mxnet,sxjscience/mxnet,vikingMei/mxnet,navrasio/mxnet,ptrendx/mxnet,madjam/mxnet,formath/mxnet,jamesliu/mxnet,TuSimple/mxnet,jennyzhang0215/incubator-mxnet,mbaijal/incubator-mxnet,ykim362/mxnet,vikingMei/mxnet,LinkHS/incubator-mxnet,luoyetx/mxnet,tlby/mxnet,jermainewang/mxnet,navrasio/mxnet,LinkHS/incubator-mxnet,ykim362/mxnet,precedenceguo/mxnet,szha/mxnet,yajiedesign/mxnet,dmlc/mxnet,luoyetx/mxnet,navrasio/mxnet,piiswrong/mxnet,indhub/mxnet,TuSimple/mxnet,piiswrong/mxnet,jamesliu/mxnet,jamesliu/mxnet,ForkedReposBak/mxnet,hpi-xnor/BMXNet,Northrend/mxnet,jiajiechen/mxnet,indhub/mxnet,mbaijal/incubator-mxnet,jamesliu/mxnet,crazy-cat/incubator-mxnet,tlby/mxnet,tlby/mxnet,jermainewang/mxnet,szha/mxnet,precedenceguo/mxnet,TuSimple/mxnet,ptrendx/mxnet,formath/mxnet,Prasad9/incubator-mxnet,formath/mxnet,hpi-xnor/BMXNet,ShownX/incubator-mxnet,weleen/mxnet,jennyzhang0215/incubator-mxnet,solin319/incubator-mxnet,mbaijal/incubator-mxnet,solin319/incubator-mxnet,kkk669/mxnet,larroy/mxnet,ptrendx/mxnet,tornadomeet/mxnet,ShownX/incubator-mxnet,zhreshold/mxnet,vikingMei/mxnet,antoan2/incubator-mxnet,rahul003/mxnet,Northrend/mxnet,larroy/mxnet,ykim362/mxnet,ShownX/incubator-mxnet,vikingMei/mxnet,wangyum/mxnet,yuruofeifei/mxnet,indhub/mxnet,ForkedReposBak/mxnet,weleen/mxnet,antoan2/incubator-mxnet,weleen/mxnet,jermainewang/mxnet,Mega-DatA-Lab/mxnet,DickJC123/mxnet,hpi-xnor/BMXNet,reminisce/mxnet,jiajiechen/mxnet,eric-haibin-lin/mxnet,jennyzhang0215/incubator-mxnet,dmlc/mxnet,tlby/mxnet,eric-haibin-lin/mxnet,mbaijal/incubator-mxnet,jennyzhang0215/incubator-mxnet,hpi-xnor/BMXNet,TuSimple/mxnet,navrasio/mxnet,Northrend/mxnet,CodingCat/mxnet,dmlc/mxnet,tornadomeet/mxnet,ShownX/incubator-mxnet,precedenceguo/mxnet,antoan2/incubator-mxnet