Add the cadd score to the variant
        
            Args:
                variant_obj (puzzle.models.Variant)
                info_dict (dict): A info dictionary

def _add_cadd_score(self, variant_obj, info_dict):
        """Add the cadd score to the variant
        
            Args:
                variant_obj (puzzle.models.Variant)
                info_dict (dict): A info dictionary
        """
        cadd_score = info_dict.get('CADD')
        if cadd_score:
            logger.debug("Updating cadd_score to: {0}".format(
                cadd_score))
            variant_obj.cadd_score = float(cadd_score)