git: openjdk/jdk17u-dev: 8280913: Create a regression test for JRootPane.setDefaultButton() method

[Goetz Lindenmaier]

Changeset: d52a8992
Author:    Goetz Lindenmaier <goetz at openjdk.org>
Date:      2022-08-01 08:48:46 +0000
URL:       https://git.openjdk.org/jdk17u-dev/commit/d52a8992127d0da28ffc2d7bf42a87dc76fa36eb

8280913: Create a regression test for JRootPane.setDefaultButton() method

Backport-of: 51b53a821bb3cfb962f80a637f5fb8cde988975a

+ test/jdk/javax/swing/JRootPane/DefaultButtonTest.java