RFR: 8315952: Open source several Swing JToolbar JTooltip JTree tests [v2]

[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

Damon Nguyen has updated the pull request incrementally with one additional commit since the last revision:

  Review comments updates

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/15755/files
  - new: https://git.openjdk.org/jdk/pull/15755/files/9af9e179..4ba1c168

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15755&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15755&range=00-01

  Stats: 57 lines in 5 files changed: 7 ins; 16 del; 34 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