[SPARK-16870][DOCS] Summary:add "spark.sql.broadcastTimeout" into docs/sql-programming-gu…
[SPARK-16870][DOCS] Summary:add "spark.sql.broadcastTimeout" into docs/sql-programming-gu…

## What changes were proposed in this pull request?
default value for spark.sql.broadcastTimeout is 300s. and this property do not show in any docs of spark. so add "spark.sql.broadcastTimeout" into docs/sql-programming-guide.md to help people to how to fix this timeout error when it happenned

## How was this patch tested?

not need

(If this patch involves UI changes, please attach a screenshot; otherwise, remove this)

…ide.md

JIRA_ID:SPARK-16870
Description:default value for spark.sql.broadcastTimeout is 300s. and this property do not show in any docs of spark. so add "spark.sql.broadcastTimeout" into docs/sql-programming-guide.md to help people to how to fix this timeout error when it happenned
Test:done

Author: keliang <keliang@cmss.chinamobile.com>

Closes #14477 from biglobster/keliang.

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