Returns the default collector settings

def get_default_config(self):
        """
        Returns the default collector settings
        """
        config = super(PassengerCollector, self).get_default_config()
        config.update({
            "path":         "passenger_stats",
            "bin":          "/usr/lib/ruby-flo/bin/passenger-memory-stats",
            "use_sudo":     False,
            "sudo_cmd":     "/usr/bin/sudo",
            "passenger_status_bin": "/usr/bin/passenger-status",
            "passenger_memory_stats_bin": "/usr/bin/passenger-memory-stats",
        })
        return config