Fix interpreter.sh to get Spark interpreter log file
Fix interpreter.sh to get Spark interpreter log file

### What is this PR for?
Currently, if users set their own `SPARK_HOME`, they can not get `zeppelin-interpreter-spark-xxxx.log` file. This PR is for fixing this issue.
(This issue is reported by weipuz)

### What type of PR is it?
Hot Fix

### Todos

### What is the Jira issue?
None

### How should this be tested?
After applying this PR,
1. Set your own `SPARK_HOME`.
2. Run `sc.version`(or whatever you want) with Spark interpreter.
3. Check under your `ZEPPELIN_HOME/logs/` directory, then you can find `zeppelin-interpreter-spark-xxx.log` file.

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update? No
* Is there breaking changes for older versions? No
* Does this needs documentation? No

Author: AhyoungRyu <fbdkdud93@hanmail.net>

Closes #769 from AhyoungRyu/fix-spark-log and squashes the following commits:

dcdad56 [AhyoungRyu] Ping travis
8564f8c [AhyoungRyu] Fix interpreter.sh to get Spark interpreter log

pravin-dsilva/zeppelin,tinkoff-dwh/zeppelin,datalayer/zeppelin,prabhjyotsingh/zeppelin,yorek/zeppelin,cjmatta/incubator-zeppelin,benoyantony/zeppelin,astroshim/zeppelin,jlagarden/zeppelin,1ambda/zeppelin,yorek/zeppelin,r-kamath/zeppelin,Nova-Boy/zeppelin,prabhjyotsingh/zeppelin,IceKhan13/zeppelin,mfelgamal/zeppelin,vipul1409/zeppelin,tillrohrmann/incubator-zeppelin,Solution-Global/zeppelin,chilang/zeppelin,rlugojr/incubator-zeppelin,rlugojr/incubator-zeppelin,prabhjyotsingh/zeppelin,VipinRathor/zeppelin,VipinRathor/zeppelin,IceKhan13/zeppelin,wary/zeppelin,granturing/incubator-zeppelin,fogbeam/zeppelin_mirror,SarunasG/zeppelin-oidc,YuanGunGun/zeppelin,rconline/zeppelin,r-kamath/incubator-zeppelin,Altiscale/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,rconline/zeppelin,astroshim/incubator-zeppelin,ravicodder/incubator-zeppelin,jlagarden/zeppelin,Solution-Global/zeppelin,1ambda/zeppelin,raysteam/zeppelin,lresende/incubator-zeppelin,Leemoonsoo/zeppelin,radicalbit/incubator-zeppelin,AlexanderShoshin/zeppelin,suvam97/zeppelin,datalayer/zeppelin,openthings/zeppelin,volumeint/zeppelin,tzolov/incubator-zeppelin,apache/zeppelin,suvam97/zeppelin,apache/zeppelin,pravin-dsilva/zeppelin,vgmartinez/incubator-zeppelin,lobamba/zeppelin,datalayer/zeppelin-datalayer,karuppayya/zeppelin,zjffdu/zeppelin,Solution-Global/zeppelin,openthings/zeppelin,soralee/zeppelin,mwkang/zeppelin,yu74n/zeppelin,AlexanderShoshin/zeppelin,datalayer/zeppelin-datalayer,spacewalkman/incubator-zeppelin,AlexanderShoshin/zeppelin,pravin-dsilva/zeppelin,zetaris/zeppelin,doanduyhai/incubator-zeppelin,ravicodder/incubator-zeppelin,Solution-Global/zeppelin,onkarshedge/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,Nova-Boy/zeppelin,anthonycorbacho/incubator-zeppelin,r-kamath/zeppelin,yu74n/zeppelin,cfries/zeppelin,apache/zeppelin,sctincman/zeppelin,anthonycorbacho/incubator-zeppelin,apache/zeppelin,SarunasG/zeppelin-oidc,openthings/zeppelin,apache/incubator-zeppelin,datalayer/zeppelin,granturing/incubator-zeppelin,sravan-s/zeppelin,igorborojevic/incubator-zeppelin,brigade/incubator-zeppelin,hammertank/zeppelin,jongyoul/incubator-zeppelin,Altiscale/incubator-zeppelin,granturing/incubator-zeppelin,jlagarden/zeppelin,hammertank/zeppelin,lresende/incubator-zeppelin,namanmishra91/zeppelin,sergeymazin/zeppelin,Solution-Global/zeppelin,igorborojevic/incubator-zeppelin,soralee/zeppelin,Leemoonsoo/zeppelin,mwkang/zeppelin,datalayer/zeppelin-datalayer,openthings/zeppelin,RamVenkatesh/incubator-zeppelin,pellmont/zeppelin,wary/zeppelin,doanduyhai/incubator-zeppelin,tzolov/incubator-zeppelin,zjffdu/zeppelin,openthings/zeppelin,jongyoul/incubator-zeppelin,namanmishra91/zeppelin,mfelgamal/zeppelin,tillrohrmann/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,herval/zeppelin,radicalbit/incubator-zeppelin,cris83/incubator-zeppelin,brigade/incubator-zeppelin,raysteam/zeppelin,radicalbit/incubator-zeppelin,1ambda/zeppelin,rerngvit/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,granturing/incubator-zeppelin,sohaibiftikhar/zeppelin,YuanGunGun/zeppelin,hammertank/zeppelin,prasadwagle/incubator-zeppelin,samuel-pt/incubator-zeppelin,IceKhan13/zeppelin,pravin-dsilva/zeppelin,apache/incubator-zeppelin,pravin-dsilva/zeppelin,hammertank/zeppelin,rerngvit/incubator-zeppelin,Leemoonsoo/zeppelin,soralee/zeppelin,astroshim/zeppelin,1ambda/zeppelin,AlexanderShoshin/zeppelin,tzolov/incubator-zeppelin,cfries/zeppelin,cquptEthan/incubator-zeppelin,Madhuka/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,sravan-s/zeppelin,vipul1409/zeppelin,jlagarden/zeppelin,AlexanderShoshin/zeppelin,chilang/zeppelin,spacewalkman/incubator-zeppelin,nikste/incubator-zeppelin,granturing/incubator-zeppelin,r-kamath/zeppelin,chilang/zeppelin,cris83/incubator-zeppelin,sctincman/zeppelin,chilang/zeppelin,Madhuka/incubator-zeppelin,Madhuka/incubator-zeppelin,rconline/zeppelin,Nova-Boy/zeppelin,fogbeam/zeppelin_mirror,r-kamath/incubator-zeppelin,volumeint/zeppelin,benoyantony/zeppelin,karuppayya/zeppelin,herval/zeppelin,Madhuka/incubator-zeppelin,Nova-Boy/zeppelin,apache/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,suvam97/zeppelin,Nova-Boy/zeppelin,karuppayya/zeppelin,digitalreasoning/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,yorek/zeppelin,tinkoff-dwh/zeppelin,karuppayya/zeppelin,SarunasG/zeppelin-oidc,RamVenkatesh/incubator-zeppelin,hammertank/zeppelin,hammertank/zeppelin,herval/zeppelin,prasadwagle/incubator-zeppelin,vgmartinez/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,prasadwagle/incubator-zeppelin,cfries/zeppelin,RamVenkatesh/incubator-zeppelin,prasadwagle/incubator-zeppelin,r-kamath/incubator-zeppelin,onkarshedge/incubator-zeppelin,benoyantony/zeppelin,zetaris/zeppelin,granturing/incubator-zeppelin,apache/incubator-zeppelin,lobamba/zeppelin,yorek/zeppelin,chilang/zeppelin,onkarshedge/incubator-zeppelin,SachinJanani/zeppelin,radicalbit/incubator-zeppelin,zjffdu/zeppelin,suvam97/zeppelin,samuel-pt/incubator-zeppelin,zetaris/zeppelin,mwpenny/zeppelin-esri,digitalreasoning/incubator-zeppelin,lresende/incubator-zeppelin,doanduyhai/incubator-zeppelin,igorborojevic/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,joroKr21/incubator-zeppelin,soralee/zeppelin,SarunasG/zeppelin-oidc,vgmartinez/incubator-zeppelin,jlagarden/zeppelin,lresende/incubator-zeppelin,rlugojr/incubator-zeppelin,yu74n/zeppelin,fogbeam/zeppelin_mirror,raysteam/zeppelin,fogbeam/zeppelin_mirror,apache/zeppelin,prabhjyotsingh/zeppelin,yorek/zeppelin,benoyantony/zeppelin,radicalbit/incubator-zeppelin,datalayer/zeppelin,karuppayya/zeppelin,digitalreasoning/incubator-zeppelin,optimizely/incubator-zeppelin,cquptEthan/incubator-zeppelin,hkropp/incubator-zeppelin,rconline/zeppelin,jlagarden/zeppelin,rerngvit/incubator-zeppelin,sohaibiftikhar/zeppelin,prabhjyotsingh/zeppelin,vrlo/zeppelin,joroKr21/incubator-zeppelin,cris83/incubator-zeppelin,cjmatta/incubator-zeppelin,pellmont/zeppelin,tinkoff-dwh/zeppelin,Leemoonsoo/zeppelin,mfelgamal/zeppelin,prabhjyotsingh/incubator-zeppelin,hkropp/incubator-zeppelin,vgmartinez/incubator-zeppelin,rerngvit/incubator-zeppelin,SachinJanani/zeppelin,ankurmitujjain/incubator-zeppelin,cfries/zeppelin,sctincman/zeppelin,raysteam/zeppelin,nikste/incubator-zeppelin,spacewalkman/incubator-zeppelin,brigade/incubator-zeppelin,nikste/incubator-zeppelin,sctincman/zeppelin,pellmont/zeppelin,Leemoonsoo/incubator-zeppelin,jongyoul/incubator-zeppelin,optimizely/incubator-zeppelin,onkarshedge/incubator-zeppelin,sctincman/zeppelin,herval/zeppelin,tillrohrmann/incubator-zeppelin,AlexanderShoshin/zeppelin,joroKr21/incubator-zeppelin,mwkang/zeppelin,doanduyhai/incubator-zeppelin,ravicodder/incubator-zeppelin,rlugojr/incubator-zeppelin,ravicodder/incubator-zeppelin,tzolov/incubator-zeppelin,sohaibiftikhar/zeppelin,sohaibiftikhar/zeppelin,Leemoonsoo/incubator-zeppelin,1ambda/zeppelin,prasadwagle/incubator-zeppelin,fogbeam/zeppelin_mirror,zetaris/zeppelin,IceKhan13/zeppelin,benoyantony/zeppelin,VipinRathor/zeppelin,cquptEthan/incubator-zeppelin,Madhuka/incubator-zeppelin,pellmont/zeppelin,sravan-s/zeppelin,Leemoonsoo/zeppelin,RamVenkatesh/incubator-zeppelin,minahlee/incubator-zeppelin,astroshim/zeppelin,rlugojr/incubator-zeppelin,tinkoff-dwh/zeppelin,zetaris/zeppelin,optimizely/incubator-zeppelin,apache/incubator-zeppelin,minahlee/incubator-zeppelin,tillrohrmann/incubator-zeppelin,mwpenny/zeppelin-esri,datalayer/zeppelin,Leemoonsoo/zeppelin,raysteam/zeppelin,RamVenkatesh/incubator-zeppelin,cquptEthan/incubator-zeppelin,apache/zeppelin,prasadwagle/incubator-zeppelin,fogbeam/zeppelin_mirror,optimizely/incubator-zeppelin,Nova-Boy/zeppelin,jongyoul/zeppelin,wary/zeppelin,minahlee/zeppelin,mfelgamal/zeppelin,namanmishra91/zeppelin,Leemoonsoo/zeppelin,tinkoff-dwh/zeppelin,Madhuka/incubator-zeppelin,sctincman/zeppelin,ankurmitujjain/incubator-zeppelin,rconline/zeppelin,sagarkulkarni3592/incubator-zeppelin,1ambda/zeppelin,sergeymazin/zeppelin,jlagarden/zeppelin,cjmatta/incubator-zeppelin,vipul1409/zeppelin,joroKr21/incubator-zeppelin,Leemoonsoo/zeppelin,tillrohrmann/incubator-zeppelin,Solution-Global/zeppelin,vrlo/zeppelin,minahlee/zeppelin,Altiscale/incubator-zeppelin,volumeint/zeppelin,r-kamath/incubator-zeppelin,vrlo/zeppelin,igorborojevic/incubator-zeppelin,sergeymazin/zeppelin,Madhuka/incubator-zeppelin,IceKhan13/zeppelin,prabhjyotsingh/zeppelin,ankurmitujjain/incubator-zeppelin,sergeymazin/zeppelin,namanmishra91/zeppelin,astroshim/incubator-zeppelin,onkarshedge/incubator-zeppelin,datalayer/zeppelin-datalayer,SarunasG/zeppelin-oidc,pellmont/zeppelin,sohaibiftikhar/zeppelin,minahlee/incubator-zeppelin,rerngvit/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,ravicodder/incubator-zeppelin,samuel-pt/incubator-zeppelin,hkropp/incubator-zeppelin,ankurmitujjain/incubator-zeppelin,cquptEthan/incubator-zeppelin,yu74n/zeppelin,sravan-s/zeppelin,granturing/incubator-zeppelin,r-kamath/zeppelin,minahlee/zeppelin,joroKr21/incubator-zeppelin,astroshim/zeppelin,pellmont/zeppelin,astroshim/incubator-zeppelin,jongyoul/zeppelin,lobamba/zeppelin,prabhjyotsingh/incubator-zeppelin,vrlo/zeppelin,jongyoul/zeppelin,minahlee/zeppelin,volumeint/zeppelin,mfelgamal/zeppelin,SachinJanani/zeppelin,radicalbit/incubator-zeppelin,IceKhan13/zeppelin,lobamba/zeppelin,astroshim/incubator-zeppelin,ravicodder/incubator-zeppelin,Altiscale/incubator-zeppelin,vipul1409/zeppelin,pravin-dsilva/zeppelin,radicalbit/incubator-zeppelin,tinkoff-dwh/zeppelin,tzolov/incubator-zeppelin,SarunasG/zeppelin-oidc,digitalreasoning/incubator-zeppelin,optimizely/incubator-zeppelin,cjmatta/incubator-zeppelin,sravan-s/zeppelin,brigade/incubator-zeppelin,lresende/incubator-zeppelin,chilang/zeppelin,ravicodder/incubator-zeppelin,optimizely/incubator-zeppelin,YuanGunGun/zeppelin,prabhjyotsingh/incubator-zeppelin,Altiscale/incubator-zeppelin,YuanGunGun/zeppelin,yu74n/zeppelin,vipul1409/zeppelin,cfries/zeppelin,VipinRathor/zeppelin,hammertank/zeppelin,zjffdu/zeppelin,zjffdu/zeppelin,cquptEthan/incubator-zeppelin,cfries/zeppelin,zetaris/zeppelin,tzolov/incubator-zeppelin,rconline/zeppelin,sctincman/zeppelin,pellmont/zeppelin,rconline/zeppelin,volumeint/zeppelin,SachinJanani/zeppelin,jongyoul/incubator-zeppelin,rerngvit/incubator-zeppelin,vrlo/zeppelin,volumeint/zeppelin,mwkang/zeppelin,SachinJanani/zeppelin,anthonycorbacho/incubator-zeppelin,digitalreasoning/incubator-zeppelin,VipinRathor/zeppelin,spacewalkman/incubator-zeppelin,IceKhan13/zeppelin,openthings/zeppelin,jongyoul/zeppelin,cris83/incubator-zeppelin,sergeymazin/zeppelin,1ambda/zeppelin,jongyoul/zeppelin,brigade/incubator-zeppelin,herval/zeppelin,r-kamath/incubator-zeppelin,nikste/incubator-zeppelin,lobamba/zeppelin,digitalreasoning/incubator-zeppelin,jongyoul/zeppelin,mwkang/zeppelin,r-kamath/zeppelin,apache/incubator-zeppelin,hkropp/incubator-zeppelin,benoyantony/zeppelin,ankurmitujjain/incubator-zeppelin,namanmishra91/zeppelin,digitalreasoning/incubator-zeppelin,datalayer/zeppelin,karuppayya/zeppelin,vipul1409/zeppelin,ankurmitujjain/incubator-zeppelin,nikste/incubator-zeppelin,minahlee/incubator-zeppelin,samuel-pt/incubator-zeppelin,jongyoul/incubator-zeppelin,mwkang/zeppelin,samuel-pt/incubator-zeppelin,mwkang/zeppelin,mwpenny/zeppelin-esri,herval/zeppelin,soralee/zeppelin,datalayer/zeppelin,pravin-dsilva/zeppelin,yu74n/zeppelin,sergeymazin/zeppelin,rlugojr/incubator-zeppelin,astroshim/zeppelin,onkarshedge/incubator-zeppelin,zjffdu/zeppelin,samuel-pt/incubator-zeppelin,r-kamath/incubator-zeppelin,jongyoul/incubator-zeppelin,vgmartinez/incubator-zeppelin,karuppayya/zeppelin,cquptEthan/incubator-zeppelin,fogbeam/zeppelin_mirror,tinkoff-dwh/zeppelin,joroKr21/incubator-zeppelin,YuanGunGun/zeppelin,tillrohrmann/incubator-zeppelin,onkarshedge/incubator-zeppelin,Solution-Global/zeppelin,wary/zeppelin,vrlo/zeppelin,r-kamath/zeppelin,sravan-s/zeppelin,doanduyhai/incubator-zeppelin,minahlee/zeppelin,VipinRathor/zeppelin,cris83/incubator-zeppelin,sergeymazin/zeppelin,benoyantony/zeppelin,cjmatta/incubator-zeppelin,astroshim/zeppelin,lobamba/zeppelin,herval/zeppelin,zjffdu/zeppelin,igorborojevic/incubator-zeppelin,anthonycorbacho/incubator-zeppelin,spacewalkman/incubator-zeppelin,suvam97/zeppelin,jongyoul/zeppelin,wary/zeppelin,vgmartinez/incubator-zeppelin,mwpenny/zeppelin-esri,joroKr21/incubator-zeppelin,nikste/incubator-zeppelin,YuanGunGun/zeppelin,optimizely/incubator-zeppelin,yorek/zeppelin,prabhjyotsingh/incubator-zeppelin,YuanGunGun/zeppelin,namanmishra91/zeppelin,chilang/zeppelin,zetaris/zeppelin,sohaibiftikhar/zeppelin,Leemoonsoo/incubator-zeppelin,cjmatta/incubator-zeppelin,openthings/zeppelin,astroshim/incubator-zeppelin,namanmishra91/zeppelin,joroKr21/incubator-zeppelin,SarunasG/zeppelin-oidc,soralee/zeppelin,doanduyhai/incubator-zeppelin,brigade/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,doanduyhai/incubator-zeppelin,yu74n/zeppelin,apache/zeppelin,sohaibiftikhar/zeppelin,Altiscale/incubator-zeppelin,yorek/zeppelin,minahlee/zeppelin,astroshim/zeppelin,prabhjyotsingh/zeppelin,sagarkulkarni3592/incubator-zeppelin,volumeint/zeppelin,suvam97/zeppelin,Leemoonsoo/incubator-zeppelin,tillrohrmann/incubator-zeppelin,raysteam/zeppelin,hkropp/incubator-zeppelin,r-kamath/incubator-zeppelin,spacewalkman/incubator-zeppelin,RamVenkatesh/incubator-zeppelin,rerngvit/incubator-zeppelin,VipinRathor/zeppelin,r-kamath/zeppelin,mfelgamal/zeppelin,SachinJanani/zeppelin,hkropp/incubator-zeppelin,raysteam/zeppelin,mwpenny/zeppelin-esri,soralee/zeppelin,lobamba/zeppelin,sravan-s/zeppelin,lresende/incubator-zeppelin,brigade/incubator-zeppelin,mwpenny/zeppelin-esri,wary/zeppelin,minahlee/zeppelin,Nova-Boy/zeppelin,astroshim/incubator-zeppelin,vrlo/zeppelin,AlexanderShoshin/zeppelin,lresende/incubator-zeppelin,spacewalkman/incubator-zeppelin,igorborojevic/incubator-zeppelin,mwpenny/zeppelin-esri,cfries/zeppelin,cris83/incubator-zeppelin,sagarkulkarni3592/incubator-zeppelin,ankurmitujjain/incubator-zeppelin,wary/zeppelin,suvam97/zeppelin,minahlee/incubator-zeppelin,mfelgamal/zeppelin,SachinJanani/zeppelin,vipul1409/zeppelin,prasadwagle/incubator-zeppelin