hg: jdk9/client/jdk: 8074883: Tab key should move to focused button in a button group

[semyon.sadetsky at oracle.com]

Changeset: eef0714323de
Author:    ssadetsky
Date:      2016-12-20 11:53 +0300
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/eef0714323de

8074883: Tab key should move to focused button in a button group
Reviewed-by: alexsch, serb

! src/java.desktop/share/classes/javax/swing/JToggleButton.java
+ test/javax/swing/JRadioButton/ButtonGroupFocus/ButtonGroupFocusTest.java