RFR: 8316061: Open source several Swing RootPane and Slider related tests [v2]

[Tejesh R]

> Open sourcing these Swing RootPane and Slider related tests:
> 
> javax/swing/JRootPane/4207333/bug4207333.java
> javax/swing/JRootPane/4224113/bug4224113.java
> javax/swing/JRootPane/4627806/bug4627806.java
> javax/swing/JSlider/4200901/bug4200901.java
> javax/swing/JSlider/4203754/bug4203754.java

Tejesh R has updated the pull request incrementally with one additional commit since the last revision:

  Review fix

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15734/files
  - new: https://git.openjdk.org/jdk/pull/15734/files/96d10af7..2511bdc4

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15734&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15734&range=00-01

  Stats: 1 line in 1 file changed: 1 ins; 0 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/15734.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15734/head:pull/15734

PR: https://git.openjdk.org/jdk/pull/15734