Fix `RftConverter.createSimple()`. Add unit tests
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8387002: Test ManualTests/JPackage/JPKG001/JPKG001_004: CommonLicenseTest fails on Windows because the license agreement text is not displayed Changes: https://git.openjdk.org/jdk/pull/31616/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31616&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8387002 Stats: 78 lines in 3 files changed: 77 ins; 0 del; 1 mod Patch: https://git.openjdk.org/jdk/pull/31616.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31616/head:pull/31616 PR: https://git.openjdk.org/jdk/pull/31616
