Github user zentol commented on the issue:
https://github.com/apache/flink/pull/5535
will merge this, as is, once travis gives a green light. The commits have
the rather nice property that they don't require changes to other classes (like
the MiniClusterResource); wouldn't want to destroy that by making parallelism
protected. As for deriving the parallelism, we could do it but there are in
general numerous things we could clean up in these tests.---
