added more tests for moving a group of students from a course

I have also modified the feature to show an error message when
a user who is not enrolled in the source course is in the list
(in the csv).
added more tests for moving students

Some of the tests I've added tests out moving students in
different situtations such as moving into a course that they are
already enrolled in and have completed the destination survey
as well.
added tests for adding oauth clients/tokens for others by superadmin
included tests for adding tutors to the add_course tests
added more tests for permissions editor

renamed function waitForLogout to waitForLogoutLogin to show what
the function does more accurately.

I have also moved the csv import files to a sub directory called
files so that the files can be more organized.