Added jtreg test to verify jpackage launcher adds app dir to `java.library.path` system property. Removed unused test/jdk/tools/jpackage/apps/installer/Hello.java. Moved test/jdk/tools/jpackage/apps/image/Hello.java to test/jdk/tools/jpackage/apps/Hello.java.
------------- Commit messages: - dummy commit - Whitespace clean up - 8271170: Add unit test for what jpackage app launcher puts in the environment Changes: https://git.openjdk.java.net/jdk/pull/5056/files Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5056&range=00 Issue: https://bugs.openjdk.java.net/browse/JDK-8271170 Stats: 342 lines in 7 files changed: 212 ins; 116 del; 14 mod Patch: https://git.openjdk.java.net/jdk/pull/5056.diff Fetch: git fetch https://git.openjdk.java.net/jdk pull/5056/head:pull/5056 PR: https://git.openjdk.java.net/jdk/pull/5056
