'Get CHAP name and secret
returns chap name and secret
chap_name and chap_secret must be 12-16 characters long'

@proxy._trace_time
def _create_chap(self, host=None):

    if host:
        if host['chap']:
            chap_name = host['chap'][0]
            LOG.debug('_create_chap:    %(chap_name)s    ', {'chap_name': chap_name})
        else:
            chap_name = host['name']
    else:
        LOG.info('_create_chap:    host    missing!!!')
        chap_name = '12345678901234'
    chap_secret = self._generate_chap_secret(chap_name)
    LOG.debug('_create_chap    (new):    %(chap_name)s    ', {'chap_name': chap_name})
    return (chap_name, chap_secret)
