Adding of open-bar runner feature

Now a super user has the possibility to create an "open-bar" runner. A flag is entered in the database to specify its type. When specify like this, any application can be run on it.

The model has been updated to add the open_bar boolean field. The account foreign key has been renamed to user to be coherent with the other models. I updated the RunnerForm.

The template received a big update to separate the applications to select from the open bar boolean. The open-bar element is seen only if the user is a super user.