[MINOR] Fix classpath issue in interpreter.sh
[MINOR] Fix classpath issue in interpreter.sh

### What is this PR for?
Minor fix for classpath in interpreter.sh

### What type of PR is it?
[Bug Fix | Improvement | Feature | Documentation | Hot Fix | Refactoring]

### Todos
* [ ] - Task

### What is the Jira issue?
* Open an issue on Jira https://issues.apache.org/jira/browse/ZEPPELIN/
* Put link here, and add [ZEPPELIN-*Jira number*] in PR title, eg. [ZEPPELIN-533]

### How should this be tested?
* First time? Setup Travis CI as described on https://zeppelin.apache.org/contribution/contributions.html#continuous-integration
* Strongly recommended: add automated unit tests for any new or changed behavior
* Outline any manual steps to test the PR here.

### Screenshots (if appropriate)

### Questions:
* Does the licenses files need update?
* Is there breaking changes for older versions?
* Does this needs documentation?

Author: Jeff Zhang <zjffdu@apache.org>

Closes #3085 from zjffdu/minor_fix and squashes the following commits:

71cf8389b [Jeff Zhang] [MINOR] Fix classpath issue in interpreter.sh

jongyoul/incubator-zeppelin,apache/incubator-zeppelin,Leemoonsoo/incubator-zeppelin,Leemoonsoo/zeppelin,hammertank/zeppelin,prabhjyotsingh/incubator-zeppelin,fogbeam/zeppelin_mirror,joroKr21/incubator-zeppelin,prabhjyotsingh/zeppelin,sergeymazin/zeppelin,joroKr21/incubator-zeppelin,mwkang/zeppelin,jongyoul/zeppelin,karuppayya/zeppelin,VipinRathor/zeppelin,hammertank/zeppelin,fogbeam/zeppelin_mirror,karuppayya/zeppelin,hammertank/zeppelin,datalayer/zeppelin-datalayer,prabhjyotsingh/zeppelin,VipinRathor/zeppelin,VipinRathor/zeppelin,zjffdu/zeppelin,jongyoul/incubator-zeppelin,apache/zeppelin,joroKr21/incubator-zeppelin,sergeymazin/zeppelin,datalayer/zeppelin-datalayer,prabhjyotsingh/incubator-zeppelin,cquptEthan/incubator-zeppelin,zjffdu/zeppelin,jongyoul/zeppelin,zjffdu/zeppelin,mwkang/zeppelin,prabhjyotsingh/zeppelin,jongyoul/zeppelin,joroKr21/incubator-zeppelin,apache/zeppelin,prabhjyotsingh/zeppelin,Leemoonsoo/incubator-zeppelin,mwkang/zeppelin,jongyoul/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,prabhjyotsingh/zeppelin,hammertank/zeppelin,jongyoul/zeppelin,datalayer/zeppelin-datalayer,Leemoonsoo/zeppelin,mwkang/zeppelin,Leemoonsoo/incubator-zeppelin,mwkang/zeppelin,Leemoonsoo/incubator-zeppelin,VipinRathor/zeppelin,Leemoonsoo/zeppelin,fogbeam/zeppelin_mirror,fogbeam/zeppelin_mirror,apache/incubator-zeppelin,VipinRathor/zeppelin,jongyoul/incubator-zeppelin,Leemoonsoo/zeppelin,apache/zeppelin,prabhjyotsingh/zeppelin,cquptEthan/incubator-zeppelin,apache/incubator-zeppelin,cquptEthan/incubator-zeppelin,zetaris/zeppelin,joroKr21/incubator-zeppelin,zetaris/zeppelin,mwkang/zeppelin,sergeymazin/zeppelin,joroKr21/incubator-zeppelin,zetaris/zeppelin,karuppayya/zeppelin,apache/incubator-zeppelin,jongyoul/incubator-zeppelin,jongyoul/zeppelin,zjffdu/zeppelin,cquptEthan/incubator-zeppelin,apache/incubator-zeppelin,zetaris/zeppelin,hammertank/zeppelin,zetaris/zeppelin,prabhjyotsingh/incubator-zeppelin,sergeymazin/zeppelin,prabhjyotsingh/zeppelin,zetaris/zeppelin,apache/incubator-zeppelin,zjffdu/zeppelin,joroKr21/incubator-zeppelin,VipinRathor/zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/incubator-zeppelin,sergeymazin/zeppelin,jongyoul/zeppelin,cquptEthan/incubator-zeppelin,fogbeam/zeppelin_mirror,zjffdu/zeppelin,hammertank/zeppelin,mwkang/zeppelin,karuppayya/zeppelin,Leemoonsoo/zeppelin,jongyoul/incubator-zeppelin,prabhjyotsingh/incubator-zeppelin,fogbeam/zeppelin_mirror,zetaris/zeppelin,sergeymazin/zeppelin,zjffdu/zeppelin,karuppayya/zeppelin,apache/zeppelin,cquptEthan/incubator-zeppelin,joroKr21/incubator-zeppelin,karuppayya/zeppelin,jongyoul/zeppelin,apache/zeppelin,cquptEthan/incubator-zeppelin,VipinRathor/zeppelin,sergeymazin/zeppelin,fogbeam/zeppelin_mirror,Leemoonsoo/incubator-zeppelin,datalayer/zeppelin-datalayer,hammertank/zeppelin,apache/zeppelin,prabhjyotsingh/incubator-zeppelin,apache/zeppelin,Leemoonsoo/zeppelin,Leemoonsoo/zeppelin,karuppayya/zeppelin