Must check if rule actually exists before proceeding with load.

def _load_11_6(self, **kwargs):
        """Must check if rule actually exists before proceeding with load."""
        if self._check_existence_by_collection(self._meta_data['container'],
                                               kwargs['name']):
            return super(Protocol_Dns, self)._load(**kwargs)
        msg = 'The application resource named, {}, does not exist on the ' \
              'device.'.format(kwargs['name'])
        raise NonExtantApplication(msg)