This PR proposes to increase the timeout of the test `StdLibTest` as it might be slow on certain configurations (e.g., "zero"). The PR also proposes to convert the test to use `junit`.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - Increase timeout and convert to junit Changes: https://git.openjdk.org/jdk/pull/30843/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30843&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8364148 Stats: 95 lines in 1 file changed: 15 ins; 16 del; 64 mod Patch: https://git.openjdk.org/jdk/pull/30843.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30843/head:pull/30843 PR: https://git.openjdk.org/jdk/pull/30843
