git: openjdk/jdk: 8283493: Create an automated regression test for RFE 4231298

[Phil Race]

Changeset: 6917c39e
Author:    Manukumar V S <mvs at openjdk.org>
Committer: Phil Race <prr at openjdk.org>
Date:      2022-03-23 23:42:39 +0000
URL:       https://git.openjdk.java.net/jdk/commit/6917c39e450e0564b8db7c96be132881a6b0a112

8283493: Create an automated regression test for RFE 4231298

Reviewed-by: serb

+ test/jdk/javax/swing/JComboBox/4231298/JComboBoxPrototypeDisplayValueTest.java