[SPARK-16650] Improve documentation of spark.task.maxFailures
[SPARK-16650] Improve documentation of spark.task.maxFailures

Clarify documentation on spark.task.maxFailures

No tests run as its documentation

Author: Tom Graves <tgraves@yahoo-inc.com>

Closes #14287 from tgravescs/SPARK-16650.

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