Check for a behavior change for AWT Exception Handler

This rule flags the String sun.awt.exception.handler.

The System property sun.awt.exception.handler was previously used to override the default exception handling behavior of the event dispatch thread. According to Java SE 7 and JDK 7 Compatibility documentation in Java 7, the user should use the new standard exception handling mechanism as described in the Thread.UncaughtExceptionHandler class.

For additional information, see the Java 7 APIs:

• Thread.UncaughtExceptionHandler Java documentation