## What is the purpose of the change This PR bumps mockito to 2.21.0 and powermock to 2.0.0-beta.5 for jdk9 compatibility.
This is a substantial version, as our current mockito version is 10 years old. As a result a fair number of incompatibilities had to be resolved. I grouped instances of the same issue into single commits, and added a note to each commit as to what has changed. Some of these are rather mechanical (like package changes), while others are pretty subtle (like the exception matching). [ Full content available at: https://github.com/apache/flink/pull/6634 ] This message was relayed via gitbox.apache.org for [email protected]
