hg: jdk/client: 8200605: Create test for GridBagLayoutDemo

[prasanta.sadhukhan at oracle.com]

Changeset: 81affcb6832c
Author:    vagarwal
Date:      2018-06-19 12:04 +0530
URL:       http://hg.openjdk.java.net/jdk/client/rev/81affcb6832c

8200605: Create test for GridBagLayoutDemo
Reviewed-by: serb, shurailine

+ test/jdk/sanity/client/SwingSet/src/GridBagLayoutDemoTest.java
! test/jdk/sanity/client/SwingSet/src/TestHelpers.java
+ test/jdk/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/gridbaglayout/Calculator.java
+ test/jdk/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/gridbaglayout/GridBagLayoutDemo.java
+ test/jdk/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/gridbaglayout/resources/GridBagLayoutDemo.properties
+ test/jdk/sanity/client/lib/SwingSet3/src/com/sun/swingset3/demos/gridbaglayout/resources/images/GridBagLayoutDemo.gif