[WIP][HOTFIX][ZEPPELIN-1286] CI for Spark 1.6 fails on master & all PRs

[jongyoul]

What is this PR for?

Making CI green with spark 1.6

What type of PR is it?

[Bug Fix | Hot Fix]

Todos

• - Set spark.version to test specific version of Spark

What is the Jira issue?

https://issues.apache.org/jira/browse/ZEPPELIN-1286

How should this be tested?

CI should be green

Screenshots (if appropriate)

Questions:

• Does the licenses files need update? No
• Is there breaking changes for older versions? No
• Does this needs documentation? No

[jongyoul]

Error occurs while building zeppelin-web. Building spark seems to be successful but I'll re-trigger it so that CI makes green. Here is the first link: https://travis-ci.org/apache/zeppelin/builds/149698224

[jongyoul]

But the second trial fails. https://s3.amazonaws.com/archive.travis-ci.org/jobs/149707456/log.txt

[jongyoul]

The third. https://s3.amazonaws.com/archive.travis-ci.org/jobs/149722781/log.txt

[bzz]

Thanks for taking care and prompt fix!
All build failures are in zeppelin-web, while NPM dependency installation

INFO] bower@1.7.2 node_modules/bower
[INFO] └── semver-utils@1.1.1
[ERROR] npm ERR! argv "/home/travis/build/apache/zeppelin/zeppelin-web/node/node" "/home/travis/build/apache/zeppelin/zeppelin-web/node/node_modules/npm/bin/npm-cli.js" "install" "--color=false"
[ERROR] npm ERR! node v0.12.13
[ERROR] npm ERR! npm  v2.15.0
[ERROR] 
[ERROR] npm ERR! Callback called more than once.
[ERROR] npm ERR! 
[ERROR] npm ERR! If you need help, you may report this error at:
[ERROR] npm ERR!     <https://github.com/npm/npm/issues>
[ERROR] 
[ERROR] npm ERR! Please include the following file with any support request:
[ERROR] npm ERR!     /home/travis/build/apache/zeppelin/zeppelin-web/npm-debug.log
[INFO] ------------------------------------------------------------------------

@jongyoul if you want to debug it in this PR - we could add cat zeppelin-web/npm-debug.lo to .travis.yaml

If not, this patch looks great to me and solves the issue, so we can merge and handle web in separate JIRA issue. What do you think?

[minahlee]

Let's merge it

[jongyoul]

@bzz @Leemoonsoo try to fix zeppelin-web issues. How about adding cat ... in that PR? #1285