Fix typo in BaseAuthTokenMiddlewareTest

Setup was used where setUp is the name of the function.

Change-Id: Ie8aef4e128a443ddec48fc82cb7314081ee5bfd2
auth_token test remove unused fake_app parameter

set_middleware is never called with fake_app, so remove it.

Change-Id: Id4541f77a12a9d43f2761f8d1fd14d633f6944ac