Force cherrypy.log.screen to be True to enable normal logging
    
    It is needed for all levels of log messages, not just debug.
    
    https://fedorahosted.org/ipsilon/ticket/171
    
    Signed-off-by: Rob Crittenden <rcritten@redhat.com>
    Reviewed-by: Patrick Uiterwijk <puiterwijk@redhat.com>