<AWT Dev> RFR: 8253274: The CycleDMImagetest brokes the system

[Phil Race]

On Thu, 17 Sep 2020 08:38:44 GMT, Sergey Bylokhov <serb at openjdk.org> wrote:

> The test checks all display modes reported by the OS.
> 
> Unfortunately on some test systems the switching from the low-resolution modes to the normal mode "takes a while", the
> system becomes broken while some other tests start to work.
> The fix will limit the resolution of modes tested, it should be bigger than 800x600. Also, the test should try to
> properly clean up the system after completion.

As discussed off-line, can we make the test wait 10 seconds before terminating to be (fairly) sure the "currentDM" mode
has been restored.

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PR: https://git.openjdk.java.net/jdk/pull/222