Review request for JDK-8038631: Create wrapper for awt.Robot with additional functionality

[Dmitriy Ermashov]

Hi,
Please, review the changeset for:
https://bugs.openjdk.java.net/browse/JDK-8038631
Webrev is here:
http://cr.openjdk.java.net/~yan/8038631/webrev.06/

Last changes consist of:
1. Commented block with "java.awt.robotdelay" property read

Also the bug JDK-8039749 was created to track the removing all 
java.awt.Robot heirs from OpnJDK repository.

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Thanks,
Dima