[SPARK-18136] Fix SPARK_JARS_DIR for Python pip install on Windows
[SPARK-18136] Fix SPARK_JARS_DIR for Python pip install on Windows

## What changes were proposed in this pull request?

Fix for setup of `SPARK_JARS_DIR` on Windows as it looks for `%SPARK_HOME%\RELEASE` file instead of `%SPARK_HOME%\jars` as it should. RELEASE file is not included in the `pip` build of PySpark.

## How was this patch tested?

Local install of PySpark on Anaconda 4.4.0 (Python 3.6.1).

Author: Jakub Nowacki <j.s.nowacki@gmail.com>

Closes #19310 from jsnowacki/master.

mdespriee/spark,tengpeng/spark,techaddict/spark,mahak/spark,lvdongr/spark,HyukjinKwon/spark,ConeyLiu/spark,lxsmnv/spark,joseph-torres/spark,BryanCutler/spark,szhem/spark,kiszk/spark,saltstar/spark,chuckchen/spark,minixalpha/spark,xuanyuanking/spark,tejasapatil/spark,bravo-zhang/spark,gengliangwang/spark,techaddict/spark,aosagie/spark,zuotingbing/spark,esi-mineset/spark,joseph-torres/spark,darionyaphet/spark,bravo-zhang/spark,rikima/spark,facaiy/spark,Aegeaner/spark,srowen/spark,nchammas/spark,wangmiao1981/spark,rezasafi/spark,techaddict/spark,rezasafi/spark,shuangshuangwang/spark,nchammas/spark,guoxiaolongzte/spark,rekhajoshm/spark,hhbyyh/spark,holdenk/spark,zhouyejoe/spark,Aegeaner/spark,aosagie/spark,ueshin/apache-spark,zzcclp/spark,apache/spark,WeichenXu123/spark,tejasapatil/spark,ioana-delaney/spark,vinodkc/spark,actuaryzhang/spark,kevinyu98/spark,xuanyuanking/spark,xuanyuanking/spark,ioana-delaney/spark,shuangshuangwang/spark,srowen/spark,cin/spark,icexelloss/spark,zuotingbing/spark,taroplus/spark,ahnqirage/spark,wangmiao1981/spark,ioana-delaney/spark,Aegeaner/spark,hhbyyh/spark,cloud-fan/spark,holdenk/spark,shaneknapp/spark,ConeyLiu/spark,JoshRosen/spark,guoxiaolongzte/spark,brad-kaiser/spark,xuanyuanking/spark,joseph-torres/spark,szhem/spark,nlalevee/spark,bravo-zhang/spark,ddna1021/spark,lvdongr/spark,jkbradley/spark,rezasafi/spark,techaddict/spark,ericvandenbergfb/spark,akopich/spark,gengliangwang/spark,wzhfy/spark,pgandhi999/spark,tejasapatil/spark,icexelloss/spark,ahnqirage/spark,ron8hu/spark,cloud-fan/spark,shuangshuangwang/spark,kevinyu98/spark,ConeyLiu/spark,ueshin/apache-spark,JoshRosen/spark,minixalpha/spark,spark-test/spark,nchammas/spark,spark-test/spark,brad-kaiser/spark,jiangxb1987/spark,nlalevee/spark,shuangshuangwang/spark,aray/spark,ddna1021/spark,hhbyyh/spark,zero323/spark,vinodkc/spark,adrian-ionescu/apache-spark,rednaxelafx/apache-spark,rikima/spark,ueshin/apache-spark,rezasafi/spark,rikima/spark,jkbradley/spark,michalsenkyr/spark,goldmedal/spark,LantaoJin/spark,zzcclp/spark,debugger87/spark,bdrillard/spark,WindCanDie/spark,LantaoJin/spark,hvanhovell/spark,shaneknapp/spark,WindCanDie/spark,witgo/spark,milliman/spark,dongjoon-hyun/spark,markhamstra/spark,kiszk/spark,lxsmnv/spark,cin/spark,ptkool/spark,sahilTakiar/spark,HyukjinKwon/spark,joseph-torres/spark,taroplus/spark,1haodian/spark,bdrillard/spark,facaiy/spark,highfei2011/spark,jiangxb1987/spark,wzhfy/spark,maropu/spark,sureshthalamati/spark,highfei2011/spark,yanboliang/spark,1haodian/spark,minixalpha/spark,skonto/spark,akopich/spark,gengliangwang/spark,nlalevee/spark,apache/spark,akopich/spark,debugger87/spark,michalsenkyr/spark,markhamstra/spark,aosagie/spark,jkbradley/spark,dbtsai/spark,pgandhi999/spark,adrian-ionescu/apache-spark,pgandhi999/spark,wangmiao1981/spark,saltstar/spark,dongjoon-hyun/spark,BryanCutler/spark,actuaryzhang/spark,ioana-delaney/spark,dongjoon-hyun/spark,BryanCutler/spark,zero323/spark,spark-test/spark,actuaryzhang/spark,ConeyLiu/spark,pgandhi999/spark,shubhamchopra/spark,ahnqirage/spark,zzcclp/spark,markhamstra/spark,WeichenXu123/spark,jiangxb1987/spark,ioana-delaney/spark,xuanyuanking/spark,WindCanDie/spark,lvdongr/spark,eyalfa/spark,chuckchen/spark,ueshin/apache-spark,nlalevee/spark,skonto/spark,hvanhovell/spark,caneGuy/spark,sahilTakiar/spark,mahak/spark,jkbradley/spark,ericvandenbergfb/spark,cin/spark,gengliangwang/spark,markhamstra/spark,guoxiaolongzte/spark,gengliangwang/spark,kiszk/spark,rednaxelafx/apache-spark,goldmedal/spark,michalsenkyr/spark,HyukjinKwon/spark,WeichenXu123/spark,holdenk/spark,kevinyu98/spark,sahilTakiar/spark,ueshin/apache-spark,wangyum/spark,ron8hu/spark,esi-mineset/spark,darionyaphet/spark,HyukjinKwon/spark,zhouyejoe/spark,ConeyLiu/spark,ptkool/spark,esi-mineset/spark,vinodkc/spark,hhbyyh/spark,wangyum/spark,bdrillard/spark,sureshthalamati/spark,cloud-fan/spark,rezasafi/spark,vinodkc/spark,joseph-torres/spark,joseph-torres/spark,cloud-fan/spark,dongjoon-hyun/spark,milliman/spark,dbtsai/spark,tengpeng/spark,darionyaphet/spark,kiszk/spark,tejasapatil/spark,spark-test/spark,saltstar/spark,szhem/spark,zzcclp/spark,milliman/spark,rekhajoshm/spark,michalsenkyr/spark,adrian-ionescu/apache-spark,nlalevee/spark,caneGuy/spark,shuangshuangwang/spark,ddna1021/spark,gengliangwang/spark,mahak/spark,JoshRosen/spark,1haodian/spark,sahilTakiar/spark,markhamstra/spark,brad-kaiser/spark,sureshthalamati/spark,rednaxelafx/apache-spark,eyalfa/spark,brad-kaiser/spark,sureshthalamati/spark,cin/spark,sahilTakiar/spark,zhouyejoe/spark,aosagie/spark,kiszk/spark,cin/spark,hhbyyh/spark,gengliangwang/spark,jiangxb1987/spark,WeichenXu123/spark,srowen/spark,kevinyu98/spark,bravo-zhang/spark,ptkool/spark,skonto/spark,lvdongr/spark,facaiy/spark,taroplus/spark,mahak/spark,mdespriee/spark,1haodian/spark,jkbradley/spark,actuaryzhang/spark,highfei2011/spark,Aegeaner/spark,rikima/spark,milliman/spark,debugger87/spark,tengpeng/spark,WindCanDie/spark,minixalpha/spark,wangmiao1981/spark,zhouyejoe/spark,saltstar/spa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