RFR: 8316306: Open source and convert manual Swing test

[Damon Nguyen]

This is to convert and open source test: javax/swing/JToolBar/4203039/bug4203039.java 

This manual test now uses PassFailJFrame to handle the display for the instructions text as well as the pass/fail buttons.

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Commit messages:
 - Remove extra newline
 - Change library path
 - Initial test conversion to open

Changes: https://git.openjdk.org/jdk/pull/15806/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15806&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316306
  Stats: 80 lines in 1 file changed: 80 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15806.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15806/head:pull/15806

PR: https://git.openjdk.org/jdk/pull/15806