hg: jdk9/client/jdk: 8167486: Device.getDisplayMode() doesn't report refresh rate on Linux in case of dual screen

[semyon.sadetsky at oracle.com]

Changeset: 815141d605ef
Author:    ssadetsky
Date:      2016-10-17 10:14 +0300
URL:       http://hg.openjdk.java.net/jdk9/client/jdk/rev/815141d605ef

8167486: Device.getDisplayMode() doesn't report refresh rate on Linux in case of dual screen
Reviewed-by: serb

! src/java.desktop/share/classes/java/awt/DisplayMode.java
! src/java.desktop/unix/native/libawt_xawt/awt/Xrandr.h
! src/java.desktop/unix/native/libawt_xawt/awt/awt_GraphicsEnv.c
+ test/java/awt/FullScreen/CurrentDisplayModeTest/CurrentDisplayModeTest.java