[9] Review Request for 8075609: java.lang.IllegalArgumentException: aContainer is not a focus cycle root of aComponent

[Vivi An]

Hello,

Could you please review below bug fix?
Change made using focusCycleRoot to get root container of the 
component's focus traversal cycle, instead of using getWindowAncestor to 
find root window, since the focus root is not always a window. Test case 
provided too.

Bug: https://bugs.openjdk.java.net/browse/JDK-8075609
Webrev: http://cr.openjdk.java.net/~van/8075609/webrev.00/

Thank you

Regards,

~ Vivi