Fix testcheckpoint to reuse spark context defined in the class
Fix testcheckpoint to reuse spark context defined in the class

mike0sv/spark,skonto/spark,dhruve/spark,hhbyyh/spark,markhamstra/spark,jrshust/spark,eyalfa/spark,dhruve/spark,andrewor14/iolap,chuckchen/spark,mike0sv/spark,saltstar/spark,wangyum/spark,adrian-ionescu/apache-spark,wzhfy/spark,ueshin/apache-spark,JerryLead/spark,panfengfeng/spark,wzhfy/spark,jianran/spark,saltstar/spark,JoshRosen/spark,rednaxelafx/apache-spark,map222/spark,rednaxelafx/apache-spark,mzl9039/spark,eyalfa/spark,vax11780/spark,tengpeng/spark,skonto/spark,HyukjinKwon/spark,chuckchen/spark,rekhajoshm/spark,caneGuy/spark,vinodkc/spark,liyichao/spark,narahari92/spark,nchammas/spark,tejasapatil/spark,srowen/spark,alunarbeach/spark,actuaryzhang/spark,kevinyu98/spark,ibm-research-ireland/sparkoscope,xflin/spark,zzcclp/spark,ericvandenbergfb/spark,zero323/spark,hvanhovell/spark,dhruve/spark,michalsenkyr/spark,janewangfb/spark,aosagie/spark,ajaysaini725/spark,patrick-nicholson/spark,dbtsai/spark,andrewor14/iolap,taroplus/spark,adrian-ionescu/apache-spark,xflin/spark,sahilTakiar/spark,poffuomo/spark,zuotingbing/spark,ptkool/spark,esi-mineset/spark,tengpeng/spark,apache/spark,jrshust/spark,sureshthalamati/spark,ahnqirage/spark,nilsgrabbert/spark,liutang123/spark,haowu80s/spark,sryza/spark,ptkool/spark,holdenk/spark,gengliangwang/spark,saltstar/spark,sachintyagi22/spark,liyichao/spark,srowen/spark,pgandhi999/spark,ericvandenbergfb/spark,vax11780/spark,saturday-shi/spark,alunarbeach/spark,yanboliang/spark,WindCanDie/spark,yanboliang/spark,jlopezmalla/spark,metamx/spark,setjet/spark,aray/spark,gioenn/xSpark,rednaxelafx/apache-spark,gengliangwang/spark,liyichao/spark,shubhamchopra/spark,publicRoman/spark,apache/spark,esi-mineset/spark,BryanCutler/spark,UndeadBaneGitHub/spark,nchammas/spark,stanzhai/spark,cloud-fan/spark,wangmiao1981/spark,aosagie/spark,Panos-Bletsos/spark-cost-model-optimizer,ioana-delaney/spark,xflin/spark,bOOm-X/spark,saltstar/spark,chuckchen/spark,koeninger/spark,aokolnychyi/spark,yanboliang/spark,icexelloss/spark,ankurdave/arthur,debugger87/spark,highfei2011/spark,mike0sv/spark,vinodkc/spark,shuangshuangwang/spark,gioenn/xSpark,UndeadBaneGitHub/spark,joseph-torres/spark,ueshin/apache-spark,someorz/spark,huang1900/spark,ahnqirage/spark,panfengfeng/spark,jkbradley/spark,sachintyagi22/spark,rezasafi/spark,andrewor14/iolap,zzcclp/spark,zuotingbing/spark,hhbyyh/spark,zero323/spark,goldmedal/spark,srowen/spark,holdenk/spark,jkbradley/spark,icexelloss/spark,WeichenXu123/spark,taroplus/spark,publicRoman/spark,cin/spark,joseph-torres/spark,highfei2011/spark,ioana-delaney/spark,icexelloss/spark,Panos-Bletsos/spark-cost-model-optimizer,bravo-zhang/spark,lyogavin/spark,ron8hu/spark,mdespriee/spark,srowen/spark,wangmiao1981/spark,jiangxb1987/spark,JoshRosen/spark,WindCanDie/spark,wangmiao1981/spark,1haodian/spark,sahilTakiar/spark,mzl9039/spark,nilsgrabbert/spark,narahari92/spark,WeichenXu123/spark,bOOm-X/spark,zero323/spark,byakuinss/spark,bdrillard/spark,goldmedal/spark,gioenn/xSpark,ddna1021/spark,LantaoJin/spark,big-pegasus/spark,setjet/spark,xflin/spark,aokolnychyi/spark,brad-kaiser/spark,ibm-research-ireland/sparkoscope,janewangfb/spark,spark-test/spark,skonto/spark,cin/spark,szhem/spark,icexelloss/spark,apache/spark,xuanyuanking/spark,nchammas/spark,michalsenkyr/spark,panfengfeng/spark,LantaoJin/spark,hvanhovell/spark,cloudera/spark,SnappyDataInc/spark,taroplus/spark,cloud-fan/spark,WeichenXu123/spark,SHASHANKB/spark,mdespriee/spark,jkbradley/spark,highfei2011/spark,darionyaphet/spark,vinodkc/spark,ConeyLiu/spark,witgo/spark,saltstar/spark,wangmiao1981/spark,andrewor14/spark,zhouyejoe/spark,liyichao/spark,andrewor14/spark,dhruve/spark,apache-spark-on-k8s/spark,map222/spark,poffuomo/spark,bdrillard/spark,JerryLead/spark,poffuomo/spark,spark-test/spark,Aegeaner/spark,esi-mineset/spark,pgandhi999/spark,sureshthalamati/spark,srowen/spark,UndeadBaneGitHub/spark,rikima/spark,akopich/spark,xuanyuanking/spark,narahari92/spark,rjpower/spark,huang1900/spark,rikima/spark,SHASHANKB/spark,jiangxb1987/spark,mzl9039/spark,pgandhi999/spark,BryanCutler/spark,metamx/spark,rednaxelafx/apache-spark,ueshin/apache-spark,jianran/spark,MLnick/spark,ajaysaini725/spark,andrewor14/iolap,metamx/spark,maropu/spark,kiszk/spark,metamx/spark,adrian-ionescu/apache-spark,someorz/spark,ibm-research-ireland/sparkoscope,guoxiaolongzte/spark,patrick-nicholson/spark,andrewor14/iolap,guoxiaolongzte/spark,actuaryzhang/spark,kimoonkim/spark,eyalfa/spark,skonto/spark,sryza/spark,ajaysaini725/spark,kiszk/spark,techaddict/spark,goldmedal/spark,cloud-fan/spark,map222/spark,WeichenXu123/spark,goldmedal/spark,akopich/spark,byakuinss/spark,andrewor14/iolap,matthewfranglen/spark,mike0sv/spark,koeninger/spark,bravo-zhang/spark,vinodkc/spark,LantaoJin/spark,sahilTakiar/spark,yanboliang/spark,zuotingbing/spark,michalsenkyr/spark,rednaxelafx/apache-spark,chuckchen/spark,rekhajoshm/spark,kissmetrics/spark,SnappyDataInc/spark,nchammas/spark,nlalevee/spark,adrian-ionescu/apache-spark,nilsgrabbert/spark,loneknightpy/spark,shubhamchopra/spark,debugger87/spark,hvanhovell/spark,ptkool/spark,kissmetrics/spark,kissmetrics/spark,nilsgrabbert/spark,zuotingbing/spark,LantaoJin/spark,hvanhovell/spark,sureshthalamati/spark,akopich/spark,vax11780/spark,vinodkc/spark,pronix/spark,witgo/spark,aray/spark,rezasafi/spark,gioenn/xSpark,shubhamchopra/spark,minixalpha/spark,BryanCutler/spark,jlopezmalla/spark,mzl9039/spark,metamx/spark,pgandhi999/spark,rekhajoshm/spark,dbtsai/spark,BryanCutler/spark,WindCanDie/spark,sryza/spark,zhouyejoe/spark,bdrillard/spark,adrian-ionescu/apache-spark,nilsgrabbert/spark,liutang123/spark,shubhamchopra/spark,stanzhai/spark,darionyaphet/spark,rednaxelafx/apache-spark,holdenk/spark,aosagie/spark,apache/spark,yanboliang/spark,narahari92/spark,ericvandenbergfb/spark,brad-kaiser/spark,haowu80s/spark,esi-mineset/spark,big-pegasus/spark,lyogavin/spark,rikima/spark,wgpshashank/spark,wgpshashank/spark,jiangxb1987/spark,cloud-fan/spark,andrewor14/spark,apache-spark-on-k8s/spark,shuangshuangwang/spark,apache-spark-on-k8s/spark,akopich/spark,koeninger/spark,setjet/spark,nchammas/spark,nlalevee/spark,spark-test/spark,spark-test/spark,facaiy/spark,shaneknapp/spark,Aegeaner/spark,lvdongr/spark,big-pegasus/spark,joseph-torres/spark,setjet/spark,janewangfb/spark,facaiy/spark,brad-kaiser/spark,1haodian/spark,xuanyuanking/spark,big-pegasus/spark,wgpshashank/spark,darionyaphet/spark,srowen/spark,mahak/spark,lyogavin/spark,panfengfeng/spark,liyichao/spark,milliman/spark,kimoonkim/spark,jiangxb1987/spark,markhamstra/spark,zzcclp/spark,zero323/spark,ibm-research-ireland/sparkoscope,tengpeng/spark,rjpower/spark,byakuinss/spark,publicRoman/spark,lvdongr/spark,eyalfa/spark,szhem/spark,jrshust/spark,1haodian/spark,MLnick/spark,HyukjinKwon/spark,rekhajoshm/spark,apache-spark-on-k8s/spark,alunarbeach/spark,apache/spark,shuangshuangwang/spark,markhamstra/spark,aosagie/spark,ioana-delaney/spark,darionyaphet/spark,ajaysaini725/spark,sureshthalamati/spark,JerryLead/spark,ueshin/apache-spark,ajaysaini725/spark,mdespriee/spark,szhem/spark,zhouyejoe/spark,aray/spark,icexelloss/spark,zero323/spark,jlopezmalla/spark,darionyaphet/spark,kimoonkim/spark,MLnick/spark,skonto/spark,jrshust/spark,liutang123/spark,shaneknapp/spark,wzhfy/spark,kevinyu98/spark,tengpeng/spark,WeichenXu123/spark,akopich/spark,lvdongr/spark,actuaryzhang/spark,ericvandenbergfb/spark,huang1900/spark,jkbradley/spark,MLnick/spark,vinodkc/spark,kiszk/spark,lvdongr/spark,Aegeaner/spark,WindCanDie/spark,mkolod/incubator-spark,kiszk/spark,tejasapatil/spark,szhem/spark,panfengfeng/spark,szhem/spark,joseph-torres/spark,spark-test/spark,techaddict/spark,holdenk/spark,hhbyyh/spark,wangyum/spark,highfei2011/spark,panfengfeng/spark,dotunolafunmiloye/spark,dongjoon-hyun/spark,minixalpha/spark,wangyum/spark,gioenn/xSpark,stanzhai/spark,SnappyDataInc/spark,hhbyyh/spark,ioana-delaney/spark,darionyaphet/spark,joseph-torres/spark,dotunolafunmiloye/spark,sureshthalamati/spark,tejasapatil/spark,ddna1021/spark,markhamstra/spark,guoxiaolongzte/spark,someorz/spark,sureshthalamati/spark,JerryLead/spark,UndeadBaneGitHub/spark,dongjoon-hyun/spark,guoxiaolongzte/spark,JerryLead/spark,liutang123/spark,MLnick/spark,maropu/spark,ptkool/spark,dongjoon-hyun/spark,jlopezmalla/spark,facaiy/spark,vinodkc/spark,bravo-zhang/spark,ddna1021/spark,mkolod/incubator-spark,caneGuy/spark,aray/spark,wgpshashank/spark,SnappyDataInc/spark,byakuinss/spark,big-pegasus/spark,xuanyuanking/spark,map222/spark,someorz/spark,chuckchen/spark,dbtsai/spark,stanzhai/spark,actuaryzhang/spark,mkolod/incubator-spark,icexelloss/spark,taroplus/spark,map222/spark,kiszk/spark,ConeyLiu/spark,holdenk/spark,patrick-nicholson/spark,highfei2011/spark,HyukjinKwon/spark,patrick-nicholson/spark,Panos-Bletsos/spark-cost-model-optimizer,WeichenXu123/spark,jiangxb1987/spark,ddna1021/spark,shuangshuangwang/spark,mkolod/incubator-spark,gengliangwang/spark,liutang123/spark,sryza/spark,jlopezmalla/spark,rjpower/spark,publicRoman/spark,mike0sv/spark,ioana-delaney/spark,pronix/spark,mzl9039/spark,Aegeaner/spark,alunarbeach/spark,guoxiaolongzte/spark,lyogavin/spark,ajaysaini725/spark,loneknightpy/spark,taroplus/spark,andrewor14/spark,xuanyuanking/spark,mahak/spark,byakuinss/spark,taroplus/spark,cloud-fan/spark,LantaoJin/spark,lxsmnv/spark,debugger87/spark,hhbyyh/spark,tengpeng/spark,ibm-research-ireland/sparkoscope,lxsmnv/spark,jrshust/spark,WindCanDie/spark,chuckchen/spark,janewangfb/spark,tejasapatil/spark,brad-kaiser/spark,koeninger/spark,aosagie/spark,narahari92/spark,pronix/spark,sureshthalamati/spark,ankurdave/arthur,taroplus/spark,ericvandenbergfb/spark,techaddict/spark,vax11780/spark,haowu80s/spark,actuaryzhang/spark,JerryLead/spark,brad-kaiser/spark,bOOm-X/spark,markhamstra/spark,LantaoJin/spark,lxsmnv/spark,ahnqirage/spark,highfei2011/spark,alunarbeach/spark,aokolnychyi/spark,shubhamchopra/spark,kimoonkim/spark,nlalevee/spark,darionyaphet/spark,zhouyejoe/spark,byakuinss/spark,ueshin/apache-spark,maropu/spark,markhamstra/spark,ericvandenbergfb/spark,aray/spark,zhouyejoe/spark,xuanyuanking/spark,dhruve/spark,lxsmnv/spark,michalsenkyr/spark,bOOm-X/spark,apache/spark,shuangshuangwang/spark,apache/spark,kevinyu98/spark,jianran/spark,kevinyu98/spark,adrian-ionescu/apache-spark,gioenn/xSpark,rednaxelafx/apache-spark,sachintyagi22/spark,ddna1021/spark,ron8hu/spark,dbtsai/spark,sachintyagi22/spark,mahak/spark,joseph-torres/spark,setjet/spark,cin/spark,ron8hu/spark,nchammas/spark,janewangfb/spark,hvanhovell/spark,metamx/spark,JoshRosen/spark,adrian-ionescu/apache-spark,milliman/spark,nilsgrabbert/spark,dbtsai/spark,patrick-nicholson/spark,bdrillard/spark,maropu/spark,ron8hu/spark,kimoonkim/spark,jlopezmalla/spark,SnappyDataInc/spark,cin/spark,dotunolafunmiloye/spark,minixalpha/spark,pgandhi999/spark,aokolnychyi/spark,michalsenkyr/spark,facaiy/spark,rekhajoshm/spark,JoshRosen/spark,SnappyDataInc/spark,jkbradley/spark,mdespriee/spark,BryanCutler/spark,JoshRosen/spark,narahari92/spark,cloud-fan/spark,jkbradley/spark,caneGuy/spark,goldmedal/spark,minixalpha/spark,setjet/spark,UndeadBaneGitHub/spark,apache-spark-on-k8s/spark,dhruve/spark,guoxiaolongzte/spark,xflin/spark,mahak/spark,aray/spark,hvanhovell/spark,Panos-Bletsos/spark-cost-model-optimizer,debugger87/spark,maropu/spark,zero323/spark,zero323/spark,kiszk/spark,sachintyagi22/spark,poffuomo/spark,SHASHANKB/spark,rikima/spark,aokolnychyi/spark,esi-mineset/spark,Panos-Bletsos/spark-cost-model-optimizer,cloudera/spark,liyichao/spark,kimoonkim/spark,WeichenXu123/spark,bravo-zhang/spark,michalsenkyr/spark,big-pegasus/spark,minixalpha/spark,ConeyLiu/spark,ibm-research-ireland/sparkoscope,haowu80s/spark,ioana-delaney/spark,someorz/spark,haowu80s/spark,apache-spark-on-k8s/spark,someorz/spark,zuotingbing/spark,spark-test/spark,sryza/spark,debugger87/spark,bdrillard/spark,kevinyu98/spark,alunarbeach/spark,vax11780/spark,andrewor14/iolap,guoxiaolongzte/spark,aokolnychyi/spark,brad-kaiser/spark,lvdongr/spark,mzl9039/spark,wzhfy/spark,tejasapatil/spark,cin/spark,kissmetrics/spark,zzcclp/spark,wangyum/spark,srowen/spark,eyalfa/spark,bravo-zhang/spark,publicRoman/spark,skonto/spark,shuangshuangwang/spark,saturday-shi/spark,koeninger/spark,BryanCutler/spark,dongjoon-hyun/spark,mahak/spark,MLnick/spark,wangyum/spark,zuotingbing/spark,facaiy/spark,mdespriee/spark,pronix/spark,zhouyejoe/spark,JerryLead/spark,Panos-Bletsos/spark-cost-model-optimizer,MLnick/spark,ajaysaini725/spark,esi-mineset/spark,joseph-torres/spark,milliman/spark,cin/spark,shaneknapp/spark,minixalpha/spark,loneknightpy/spark,milliman/spark,tengpeng/spark,ibm-research-ireland/sparkoscope,ConeyLiu/spark,jianran/spark,jianran/spark,panfengfeng/spark,kiszk/spark,goldmedal/spark,jlopezmalla/spark,stanzhai/spark,witgo/spark,gengliangwang/spark,map222/spark,kissmetrics/spark,ahnqirage/spark,alunarbeach/spark,loneknightpy/spark,aosagie/spark,saturday-shi/spark,actuaryzhang/spark,wzhfy/spark,rikima/spark,ron8hu/spark,rezasafi/spark,LantaoJin/spark,mahak/spark,pronix/spark,wzhfy/spark,kevinyu98/spark,lxsmnv/spark,janewangfb/spark,caneGuy/spark,saturday-shi/spark,bravo-zhang/spark,kevinyu98/spark,bdrillard/spark,witgo/spark,liutang123/spark,HyukjinKwon/spark,ddna1021/spark,holdenk/spark,nilsgrabbert/spark,wangmiao1981/spark,loneknightpy/spark,HyukjinKwon/spark,debugger87/spark,szhem/spark,mahak/spark,mike0sv/spark,bOOm-X/spark,poffuomo/spark,loneknightpy/spark,aokolnychyi/spark,jianran/spark,jrshust/spark,wzhfy/spark,nlalevee/spark,BryanCutler/spark,akopich/spark,techaddict/spark,bdrillard/spark,andrewor14/spark,ankurdave/arthur,sachintyagi22/spark,sahilTakiar/spark,liutang123/spark,janewangfb/spark,1haodian/spark,bOOm-X/spark,stanzhai/spark,hhbyyh/spark,sahilTakiar/spark,patrick-nicholson/spark,markhamstra/spark,hvanhovell/spark,esi-mineset/spark,shaneknapp/spark,bOOm-X/spark,mkolod/incubator-spark,tejasapatil/spark,wangmiao1981/spark,shaneknapp/spark,narahari92/spark,publicRoman/spark,gengliangwang/spark,kimoonkim/spark,techaddict/spark,1haodian/spark,HyukjinKwon/spark,facaiy/spark,highfei2011/spark,pgandhi999/spark,lxsmnv/spark,lyogavin/spark,holdenk/spark,techaddict/spark,JoshRosen/spark,sahilTakiar/spark,spark-test/spark,mike0sv/spark,mdespriee/spark,techaddict/spark,jianran/spark,gengliangwang/spark,witgo/spark,liyichao/spark,patrick-nicholson/spark,ahnqirage/spark,dongjoon-hyun/spark,sahilTakiar/spark,big-pegasus/spark,kissmetrics/spark,pronix/spark,saturday-shi/spark,Aegeaner/spark,dbtsai/spark,jiangxb1987/spark,ahnqirage/spark,gengliangwang/spark,1haodian/spark,shaneknapp/spark,aosagie/spark,zuotingbing/spark,nlalevee/spark,setjet/spark,huang1900/spark,rekhajoshm/spark,WindCanDie/spark,xflin/spark,mzl9039/spark,szhem/spark,dhruve/spark,zzcclp/spark,UndeadBaneGitHub/spark,1haodian/spark,facaiy/spark,brad-kaiser/spark,ptkool/spark,ioana-delaney/spark,rikima/spark,dongjoon-hyun/spark,ueshin/apache-spark,chuckchen/spark,Aegeaner/spark,witgo/spark,publicRoman/spark,shuangshuangwang/spark,ron8hu/spark,nlalevee/spark,ueshin/apache-spark,jrshust/spark,milliman/spark,shubhamchopra/spark,cloudera/spark,jiangxb1987/spark,xflin/spark,HyukjinKwon/spark,ericvandenbergfb/spark,ptkool/spark,ankurdave/arthur,xuanyuanking/spark,minixalpha/spark,milliman/spark,kissmetrics/spark,cin/spark,mdespriee/spark,saltstar/spark,ConeyLiu/spark,huang1900/spark,poffuomo/spark,shaneknapp/spark,hhbyyh/spark,nlalevee/spark,tengpeng/spark,loneknightpy/spark,rjpower/spark,eyalfa/spark,tejasapatil/spark,rezasafi/spark,map222/spark,dotunolafunmiloye/spark,ddna1021/spark,sachintyagi22/spark,ConeyLiu/spark,saturday-shi/spark,caneGuy/spark,zhouyejoe/spark,metamx/spark,SHASHANKB/spark,ahnqirage/spark,WindCanDie/spark,cloudera/spark,andrewor14/spark,rezasafi/spark,caneGuy/spark,stanzhai/spark,jkbradley/spark,someorz/spark,milliman/spark,huang1900/spark,bravo-zhang/spark,skonto/spark,saturday-shi/spark,pgandhi999/spark,lxsmnv/spark,witgo/spark,akopich/spark,zzcclp/spark,Panos-Bletsos/spark-cost-model-optimizer,andrewor14/spark,SHASHANKB/spark,ConeyLiu/spark,SnappyDataInc/spark,rezasafi/spark,lvdongr/spark,maropu/spark,byakuinss/spark,michalsenkyr/spark,maropu/spark,goldmedal/spark,debugger87/spark,wangyum/spark,poffuomo/spark,yanboliang/spark,rikima/spark,dbtsai/spark,Aegeaner/spark,aray/spark,SHASHANKB/spark,wangyum/spark,shubhamchopra/spark,rjpower/spark,yanboliang/spark,ptkool/spark,cloud-fan/spark,SHASHANKB/spark,icexelloss/spark,apache-spark-on-k8s/spark,lvdongr/spark,ron8hu/spark,JoshRosen/spark,huang1900/spark,zzcclp/spark,actuaryzhang/spark,nchammas/spark,wangmiao1981/spark,caneGuy/spark,UndeadBaneGitHub/spark,saltstar/spark,eyalfa/spark,rezasafi/spark,gioenn/xSpark,cloudera/spark,dongjoon-hyun/spark,haowu80s/spark,rekhajoshm/spark