Return help text for collector

def get_default_config_help(self):
        """
        Return help text for collector
        """
        config_help = super(PostgresqlCollector,
                            self).get_default_config_help()
        config_help.update({
            'host': 'Hostname',
            'dbname': 'DB to connect to in order to get list of DBs in PgSQL',
            'user': 'Username',
            'password': 'Password',
            'port': 'Port number',
            'password_provider': "Whether to auth with supplied password or"
            " .pgpass file  <password|pgpass>",
            'sslmode': 'Whether to use SSL - <disable|allow|require|...>',
            'underscore': 'Convert _ to .',
            'extended': 'Enable collection of extended database stats.',
            'metrics': 'List of enabled metrics to collect',
            'pg_version': "The version of postgres that you'll be monitoring"
            " eg. in format 9.2",
            'has_admin': 'Admin privileges are required to execute some'
            ' queries.',
        })
        return config_help