[SPARK-12829] Turn Java style checker on
[SPARK-12829] Turn Java style checker on

It was previously turned off because there was a problem with a pull request. We should turn it on now.

Author: Reynold Xin <rxin@databricks.com>

Closes #10763 from rxin/SPARK-12829.

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