Fix jenkins from giving the green light to builds that don't compile.
Fix jenkins from giving the green light to builds that don't compile.

 Adding `| grep` swallows the non-zero return code from sbt failures. See [here](https://amplab.cs.berkeley.edu/jenkins/job/SparkPullRequestBuilder/13735/consoleFull) for a Jenkins run that fails to compile, but still gets a green light.

Note the [BUILD FIX] commit isn't actually part of this PR, but github is out of date.

Author: Michael Armbrust <michael@databricks.com>

Closes #317 from marmbrus/fixJenkins and squashes the following commits:

7c77ff9 [Michael Armbrust] Remove output filter that was swallowing non-zero exit codes for test failures.

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