hg: jdk/client: 8222519: ButtonDemoScreenshotTest fails randomly with "still state to be reached"

[abdul.kolarkunnu at oracle.com]

Changeset: a7a436e080c1
Author:    vagarwal
Date:      2019-04-30 04:15 -0700
URL:       http://hg.openjdk.java.net/jdk/client/rev/a7a436e080c1

8222519: ButtonDemoScreenshotTest fails randomly with "still state to be reached"
Reviewed-by: serb

! test/jdk/sanity/client/SwingSet/src/ButtonDemoScreenshotTest.java