Added a log4j properties file for graphx unit tests.
Added a log4j properties file for graphx unit tests.

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