Update kb kb_name with a new name and (optionally) description.

    :param kb_name: the name of the kb to update
    :param new_name: the new name for the kb
    :param new_description: the new description for the kb

def update_kb_attributes(kb_name, new_name, new_description=''):
    """Update kb kb_name with a new name and (optionally) description.

    :param kb_name: the name of the kb to update
    :param new_name: the new name for the kb
    :param new_description: the new description for the kb
    """
    models.KnwKB.query.filter_by(name=kb_name) \
        .update({"name": new_name, "description": new_description})