[SPARK-13035][ML][PYSPARK] PySpark ml.clustering support export/import
[SPARK-13035][ML][PYSPARK] PySpark ml.clustering support export/import

PySpark ml.clustering support export/import.

Author: Yanbo Liang <ybliang8@gmail.com>

Closes #10999 from yanboliang/spark-13035.

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