Hello.
Please review the fix for jdk12.

Bug: https://bugs.openjdk.java.net/browse/JDK-8210231
Webrev: http://cr.openjdk.java.net/~serb/8210231/webrev.00

The Robot.delay() is a simple wrapper on top of Thread.sleep(), which ignores 
the InterruptedException. But in case of InterruptedException it prints the 
stack trace, which is unspecified behavior.

In the fix the "printStackTrace()" was removed, and the interrupted state of 
the thread is restored.

--
Best regards, Sergey.

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