git: openjdk/jdk: 8328570: Convert closed JViewport manual applet tests to main

[Prasanta Sadhukhan]

Changeset: 725d87bb
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2024-03-21 14:46:20 +0000
URL:       https://git.openjdk.org/jdk/commit/725d87bbc2abae2ca856d91668f0a494f93fca1c

8328570: Convert closed JViewport manual applet tests to main

Reviewed-by: abhiscxk, kizune

+ test/jdk/javax/swing/JViewport/bug4137282.java
+ test/jdk/javax/swing/JViewport/bug4217252.java
+ test/jdk/javax/swing/JViewport/bug4237176.java
+ test/jdk/javax/swing/JViewport/bug4243479.java
+ test/jdk/javax/swing/JViewport/bug4750421.java