[lworld] RFR: 8373880

[Paul Hübner]

Trivial PR to problem list noisy failing tests.

As far as I have observed (so far): the tools tests fail with and without --enable-preview. The rest only with --enable-preview.

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Commit messages:
 - Add the actual tests.
 - Update duplicate JBS entry.

Changes: https://git.openjdk.org/valhalla/pull/1815/files
  Webrev: https://webrevs.openjdk.org/?repo=valhalla&pr=1815&range=00
  Stats: 10 lines in 4 files changed: 9 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/valhalla/pull/1815.diff
  Fetch: git fetch https://git.openjdk.org/valhalla.git pull/1815/head:pull/1815

PR: https://git.openjdk.org/valhalla/pull/1815