Another fix for mac: Add java 1.8 to condition + direct call to MacSpecifics.

This should finally make the dummy test work on all macs again. First, it adds
a new condition so that the awt.toolkit property is set correctly for both
java 1.7 and 1.8 on mac. Also, this commit adds a direct call to MacSpecifics
from within the dummy test (which does not use RequirementAwareSuite).