There seems to be some failures in tests that test...

# gradle

[jlleitschuh]

There seems to be some failures in tests that test with the kotlin plugin version 1.0. Which makes sense. Kotlin didn't support JDK 9 until 1.1.4 or something.
We may need a rule to disable those tests.

Is there any interest in moving the Gradle Script Kotlin tests over to using JUnit 5 now that there is a stable release? @bamboo @eskatos