Fix Surfire test plugin.
    
    When running an Eclipse bundle's tests, Tycho Surefire resolves its
    runtime dependencies using a class loader, which is in fact just looking
    through Bundle-ClassPath. As a result, it must copy over and include
    system jars in its Bundle-ClassPath. We use Fedora system jars to
    satisfy these dependencies but even these jars differ slightly in terms
    of provided classes.