Fix the regression introduced by [JDK-8333664](https://bugs.openjdk.org/browse/JDK-8333664) that jpackage was not using entitlements when signing directories. This gave the main launcher no entitlements.
Additionally, enhance `jdk.jpackage.internal.util.PListReader` class. Test code will verify that all launchers have the entitlements when `--mac-sign` is used or when a predefined app image is signed. Ensured signing tests failed without the fix to `AppImageSigner.java` and that they passed with the fix. ------------- Commit messages: - Strip trailing whitespace - Follow up to PListReader changes - PListReader: add queryDictValue(); update javadoc - Add extra test cases - Applied blessed-modifier-order.sh - Update PListReader - Need to access jdk.jpackage/jdk.jpackage.internal.resources.ResourceLocator from tests - Verify launchers have entitlements when app is signed. - Enhance PListReader - Enhance PListReader. Changes: https://git.openjdk.org/jdk/pull/27493/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=27493&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8358723 Stats: 610 lines in 10 files changed: 547 ins; 8 del; 55 mod Patch: https://git.openjdk.org/jdk/pull/27493.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/27493/head:pull/27493 PR: https://git.openjdk.org/jdk/pull/27493
