RFR: 8339510: [TestBug] Convert system tests to JUnit 5

[Kevin Rushforth]

On Wed, 18 Sep 2024 20:04:47 GMT, Andy Goryachev <angorya at openjdk.org> wrote:

>> my mistake.  switched to the Timeout annotation.
>
> fixed

Thanks for fixing this. Btw, I see a few now-used imports of `org.junit.jupiter.api.Assertions.assertTimeout`.

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

PR Review Comment: https://git.openjdk.org/jfx/pull/1569#discussion_r1765741410