rake tasks for fixing up model problems
rake tasks for fixing up model problems

new tasks in rigse:convert scope:

* add_author_role_to_authors
* remove_author_role_from_non_authors
* transfer_investigations_owned_by_anonymous

concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse,concord-consortium/rigse