Description
The used Spark version in the .../base/Dockerfile is stale on 0.8.1 and should be updated to 0.9.x to match the release.
See:
https://github.com/apache/incubator-spark/blob/branch-0.9/docker/spark-test/base/Dockerfile
PS: Should we add a component for 'Docker'? - not sure under which component I should file this bug.