RFR: 8301569: list mode of jmod and jimage cannot be used normally in turkish locale

[Glavo]

When the default Locale is `tr`, the jmod and jimage commands have the following problems:

* The jmod command does not correctly recognize the `list` mode typed in lowercase;
* The jimage command cannot obtain the help information of the `list` mode.

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Commit messages:
 - list mode of jmod and jimage cannot be used normally in turkish locale

Changes: https://git.openjdk.org/jdk/pull/12281/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=12281&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8301569
  Stats: 4 lines in 2 files changed: 0 ins; 0 del; 4 mod
  Patch: https://git.openjdk.org/jdk/pull/12281.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12281/head:pull/12281

PR: https://git.openjdk.org/jdk/pull/12281