hg: openjfx/9-dev/rt: 8172554: [macos] deadlock on JFXPanel startup

[kevin.rushforth at oracle.com]

Changeset: 01023e38dcec
Author:    ssadetsky
Date:      2017-02-06 09:17 -0800
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/01023e38dcec

8172554: [macos] deadlock on JFXPanel startup
Reviewed-by: kcr

! modules/javafx.swing/src/main/java/javafx/embed/swing/JFXPanel.java
+ tests/system/src/test/java/test/robot/javafx/embed/swing/JFXPanelTest.java