[11] RFR: 8202553: Update FXLauncherTest as part of removing JavaFX from JDK

[Kevin Rushforth]

Please review the following test fix:

https://bugs.openjdk.java.net/browse/JDK-8202553
http://cr.openjdk.java.net/~kcr/8202553/webrev.00/

This modifies the existing FXLauncherTest as follows:

1. Reverse the check for the presence of the 
javafx.application.Application class and fail the test if present

2. Create a "mock" javafx.graphics module with a mocked up version of 
the few classes needed to validate the FX launcher functionality

3. Remove the "intermittent" and "headful" keywords, since neither apply 
any more

4. Remove the test from the problem list

Thanks.

-- Kevin