RFR: 8315804: Open source several Swing JTabbedPane JTextArea JTextField tests [v2]

[Damon Nguyen]

> These are the tests being converted:
> 
> javax/swing/JTabbedPane/4703690/bug4703690.java
> javax/swing/JTabbedPane/GetComponentAt/GetComponentAtTest.java
> javax/swing/JTabbedPane/ReplaceCompTab/ReplaceCompTab.java
> javax/swing/JTextArea/4849868/bug4849868.java
> javax/swing/JTextField/4244613/bug4244613.java

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

  Review comments update

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

Changes:
  - all: https://git.openjdk.org/jdk/pull/15747/files
  - new: https://git.openjdk.org/jdk/pull/15747/files/e2a6b227..93e3c67f

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=15747&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=15747&range=00-01

  Stats: 104 lines in 5 files changed: 25 ins; 41 del; 38 mod
  Patch: https://git.openjdk.org/jdk/pull/15747.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/15747/head:pull/15747

PR: https://git.openjdk.org/jdk/pull/15747