add a job to the config with <host> and <job_name>

def add_job(self, raw_host, job_name):
        """ add a job to the config with <host> and <job_name> """
        url_host_map = dict(((host_dict.get('url', host_name).rstrip('/'), host_name)
                             for host_name, host_dict in self._config_dict.items()))

        if raw_host in self._config_dict:
            host_url = self._config_dict[raw_host].get('url', raw_host)
            host = raw_host
        elif raw_host in url_host_map:
            host_url = raw_host
            host = url_host_map[raw_host]
        else:
            host_url, host = raw_host, raw_host

        if host not in self._config_dict:
            self._config_dict[host] = {
                'url': host_url,
                'jobs': []
            }
        if 'jobs' not in self._config_dict[host]:
            self._config_dict[host]['jobs'] = []
        self._config_dict[host]['jobs'].append(job_name)
        self._add_job(host, job_name, host_url=host_url)