RFR: 8315952: Open source several Swing JToolbar JTooltip JTree tests

[Damon Nguyen]

These are the tests being converted:

javax/swing/JToolBar/4368050/bug4368050.java
javax/swing/JToolBar/4465534/bug4465534.java
javax/swing/JToolBar/4700351/bug4700351.java
javax/swing/JToolTip/4107843/bug4107843.java
javax/swing/JTree/4161685/bug4161685.java

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Commit messages:
 - Initial test conversion to open

Changes: https://git.openjdk.org/jdk/pull/15755/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=15755&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8315952
  Stats: 271 lines in 5 files changed: 271 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15755.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15755/head:pull/15755

PR: https://git.openjdk.org/jdk/pull/15755