Returns the default collector settings

def get_default_config(self):
        """
        Returns the default collector settings
        """
        config = super(NtpCollector, self).get_default_config()
        config.update({
            'bin':      self.find_binary('/usr/sbin/ntpdate'),
            'ntp_pool': 'pool.ntp.org',
            'path':     'ntp',
            'precision': 0,
            'time_scale': 'milliseconds',
        })
        return config