[TESTBUG] - Backport of client test fix from jdk mainline to jdk8ucpu - javax/swing/JButton/4385611/bug4385611.java.

The test bug4385611.java under javax/swing/JButton/4385611/ in jdk8ucpu needs to be synced up with changes in mainline compared

The bug which needs to be backported is
8078655: [TEST_BUG] closed/javax/swing/JButton/4385611/bug4385611.java fails due to different JButton size in WindowsClassicLookAndFeel

There is another backport (8189656: The Windows L&F should be moved out from the shared folder) which is a bulk backport and this test class is only a part of that entire list of files which are changed - and hence this will be picked up separately.