Returns the default collector settings

def get_default_config(self):
        """
        Returns the default collector settings
        """
        config = super(DiskUsageCollector, self).get_default_config()
        config.update({
            'path':     'iostat',
            'devices':  ('PhysicalDrive[0-9]+$' +
                         '|md[0-9]+$' +
                         '|sd[a-z]+[0-9]*$' +
                         '|x?vd[a-z]+[0-9]*$' +
                         '|disk[0-9]+$' +
                         '|dm\-[0-9]+$'),
            'sector_size': 512,
            'send_zero': False,
        })
        return config