[SPARK-5275] [Streaming] include python source code
[SPARK-5275] [Streaming] include python source code

Include the python source code into assembly jar.

cc mengxr pwendell

Author: Davies Liu <davies@databricks.com>

Closes #4128 from davies/build_streaming2 and squashes the following commits:

546af4c [Davies Liu] fix indent
48859b2 [Davies Liu] include python source code

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