hg: openjfx/9-dev/rt: 8157500: Create unit tests for new public methods in GridPane

[chien.yang at oracle.com]

Changeset: ff0caf528269
Author:    ckyang
Date:      2016-06-23 21:52 -0700
URL:       http://hg.openjdk.java.net/openjfx/9-dev/rt/rev/ff0caf528269

8157500: Create unit tests for new public methods in GridPane
Reviewed-by: kcr

! modules/graphics/src/test/java/test/javafx/scene/layout/GridPaneTest.java