add test for adding default attribute
add test for adding default attribute

samtuke/phplist3,danwaterloo/phplist3,phpList/phplist3,mariez/phplist3,bramley/phplist3,mariez/phplist3,phpList/phplist3,danwaterloo/phplist3,mariez/phplist3,bramley/phplist3,samtuke/phplist3,mariez/phplist3,phpList/phplist3,samtuke/phplist3,phpList/phplist3,bramley/phplist3,samtuke/phplist3,danwaterloo/phplist3,samtuke/phplist3,danwaterloo/phplist3,mariez/phplist3,phpList/phplist3,danwaterloo/phplist3,bramley/phplist3,bramley/phplist3