RFR: 8316388: Opensource five Swing component related regression tests [v3]

[Alexander Zuev]

> Clean up five more tests.
> 
> test/jdk/javax/swing/JDesktopPane/4132993/bug4132993.java
> test/jdk/javax/swing/JDesktopPane/4773378/bug4773378.java
> test/jdk/javax/swing/JEditorPane/4325606/bug4325606.java
> test/jdk/javax/swing/JEditorPane/4330998/bug4330998.java
> test/jdk/javax/swing/JEditorPane/4694598/FrameContent.html
> test/jdk/javax/swing/JEditorPane/4694598/bug4694598.java

Alexander Zuev has updated the pull request incrementally with one additional commit since the last revision:

  Minor changes based on the review.
  Tests moved to the components folders.

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18184/files
  - new: https://git.openjdk.org/jdk/pull/18184/files/84eb696b..8a3496c3

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18184&range=02
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18184&range=01-02

  Stats: 20 lines in 4 files changed: 4 ins; 7 del; 9 mod
  Patch: https://git.openjdk.org/jdk/pull/18184.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/18184/head:pull/18184

PR: https://git.openjdk.org/jdk/pull/18184