RFR: 8316388: Opensource five Swing component related regression tests [v2]

[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:

  Bumped copyright year of the affected tests
  Minor changes based on the review comments

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/18184/files
  - new: https://git.openjdk.org/jdk/pull/18184/files/71461d63..84eb696b

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=18184&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=18184&range=00-01

  Stats: 60 lines in 5 files changed: 12 ins; 13 del; 35 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