Fix missing l10n key. Add a test to cover the fix. -------------
Commit messages: - MacApplicationBuilder: fix missing "message.app-image-requires-identifier" key Changes: https://git.openjdk.org/jdk/pull/29905/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=29905&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8378867 Stats: 40 lines in 4 files changed: 34 ins; 3 del; 3 mod Patch: https://git.openjdk.org/jdk/pull/29905.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/29905/head:pull/29905 PR: https://git.openjdk.org/jdk/pull/29905
