[7u6] Review request for 7182902 [macosx] Test api/java_awt/GraphicsDevice/indexTGF.html#SetDisplayMode fails on Mac OS X 10.7

[Alexander Scherbatiy]

Please review the fix:

bug: http://bugs.sun.com/bugdatabase/view_bug.do?bug_id=7182902
webrev: http://cr.openjdk.java.net/~alexsch/7182902/webrev7u6.00/


This is a backported fix from the JDK 8 to JDK 7u6.

There are 3 fixed problems:
- GraphicsDevice can have display mode which has non zero refresh rate.
   In this case the getBestModeForParameters method from the 
CGraphicsDevice.m class should
   return appropriate display mode even if the requested refresh rate is 
zero.

- The original DisplayMode should be restored after exiting from the 
Full Screen mode.

- IllegalArgumentException should be thrown in case if matching display 
mode is not found


Thanks,
Alexandr.