Query device for all attributes that are known.

        This will force a refresh for all device queries that the module is
        aware of.  In theory, this will completely populate the internal state
        table for all attributes.

        This does not return any data, it just issues the queries.

def refresh_all(self):
        """Query device for all attributes that are known.

        This will force a refresh for all device queries that the module is
        aware of.  In theory, this will completely populate the internal state
        table for all attributes.

        This does not return any data, it just issues the queries.
        """
        self.log.info('refresh_all')
        for key in LOOKUP:
            self.query(key)