[jdk26u] RFR: 8374434: Several JShell tests report JUnit discovery warnings

[Shivangi Gupta]

Straight Backport. Ran the tests ,all passed.

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Commit messages:
 - Backport e6abf98e35079ed1b5547f2cc0ac6f518b78d67b

Changes: https://git.openjdk.org/jdk26u/pull/19/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk26u&pr=19&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8374434
  Stats: 7 lines in 3 files changed: 0 ins; 4 del; 3 mod
  Patch: https://git.openjdk.org/jdk26u/pull/19.diff
  Fetch: git fetch https://git.openjdk.org/jdk26u.git pull/19/head:pull/19

PR: https://git.openjdk.org/jdk26u/pull/19