Acceptance flow - csv import

This fails Rubocop right now but I wanted to put it up so you can see the code and get an idea of how it works.
This is definitely an unmaintainable method without a unit test.  It's also not a generic import of users.  It's specifically an import of users to add to the LMS.  If you want to punt on writing a unit test for this since it requires instrumenting the call to the create_canvas_user, I would at least add a comment to this method clarifying what it does and giving some detail on expected format of the imported .csv.