Comment 4 for bug 1771776

If one were to add the ability to create institution on user authorise they would need to take note of:

1) It should be against the site's 'mahara' (called "No institution") institution
2) It should be an option that one can choose when setting up the auth instance
3) Could add the check in request_user_authorise() just after defining $institutionname
 where if $instituionname doesn't exist and we allow create of institution we can create one now