Github user felixcheung commented on the issue:
https://github.com/apache/zeppelin/pull/1682
What do people think about the `--quiet` switch
[here](https://github.com/apache/zeppelin/pull/1682/commits/72816893e822e30966d3317c8f9b86b203e856d1)?
Seems like it help reduce the Travis "log too long" build error
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