Bump SparkR version string to 1.5.0
Bump SparkR version string to 1.5.0

This patch is against master, but we need to apply it to 1.5 branch as well.

cc shivaram  and rxin

Author: Hossein <hossein@databricks.com>

Closes #8291 from falaki/SparkRVersion1.5.

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