Github user bzz commented on the issue:
https://github.com/apache/zeppelin/pull/1689
CI fails \w
```
[ERROR] Failed to execute goal
com.googlecode.maven-download-plugin:download-maven-plugin:1.3.0:wget
(download-pyspark-files) on project zeppelin-spark-dependencies_2.11: IO Error:
Could not get content -> [Help 1]
[ERROR]
```
@1ambda why removing `ls` command? It was used to identify cache misses
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