[SPARK-15966][DOC] Add closing tag to fix rendering issue for Spark monitoring
[SPARK-15966][DOC] Add closing tag to fix rendering issue for Spark monitoring

## What changes were proposed in this pull request?
Adds the missing closing tag for spark.ui.view.acls.groups

## How was this patch tested?
I built the docs locally and verified the changed in browser.

(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)
**Before:**
![image](https://cloud.githubusercontent.com/assets/7732317/16135005/49fc0724-33e6-11e6-9390-98711593fa5b.png)

**After:**
![image](https://cloud.githubusercontent.com/assets/7732317/16135021/62b5c4a8-33e6-11e6-8118-b22fda5c66eb.png)

Author: Dhruve Ashar <dhruveashar@gmail.com>

Closes #13719 from dhruve/doc/SPARK-15966.

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