RFR: 8274274: Update JavaFX test framework to JUnit 5

Fri Sep 24 20:41:21 UTC 2021

On Fri, 24 Sep 2021 20:05:01 GMT, John Hendrikx <jhendrikx at openjdk.org> wrote:

> I've added JUnit 5 as a test dependency and made sure that the JUnit 4 tests still work.  Also added a single JUnit 5 tests, and confirmed it works.
> 
> I've updated the Eclipse project file for the base module only.

Sorry for the force push, forgot I already submitted it as a PR.  I only removed a few extraneous dependencies that got added in the `verification-metadata.xml` (a few extra got added from different versions of JUnit 5 that weren't needed for the final version I'm using).

-------------

PR: https://git.openjdk.java.net/jfx/pull/633