git: openjdk/jdk: 8315600: Open source few more headless Swing misc tests

[Prasanta Sadhukhan]

Changeset: b05198a4
Author:    Prasanta Sadhukhan <psadhukhan at openjdk.org>
Date:      2023-09-07 03:49:42 +0000
URL:       https://git.openjdk.org/jdk/commit/b05198a4f354934bc344fe9cbc19d98fd8bc3977

8315600: Open source few more headless Swing misc tests

Reviewed-by: aivanov

+ test/jdk/javax/swing/tree/FixedHeightLayoutCache/bug4210354.java
+ test/jdk/javax/swing/undo/UndoManager/bug4706533.java
+ test/jdk/javax/swing/undo/bug4992178.java