change default format for imported options

Signed-off-by:Eric Villard <dev@eviweb.fr>
alter database schema

add group binding support to database

Signed-off-by:Eric Villard <dev@eviweb.fr>
add group binding feature

Signed-off-by:Eric Villard <dev@eviweb.fr>
fix non unique option names

Signed-off-by:Eric Villard <dev@eviweb.fr>