RFR: 8373893: Refactor networking http server tests to use JUnit

[Michael McMahon]

On Sun, 21 Dec 2025 14:56:02 GMT, Eirik Bjørsnøs <eirbjo at openjdk.org> wrote:

> @Michael-Mc-Mahon Would you mind adding «JUnit» to the issue / PR title somehow?
> 
> The current title reads a bit nondescript for future code historians.

Done!

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PR Comment: https://git.openjdk.org/jdk/pull/28908#issuecomment-3681764383