fix references to @template in controllers for rails 3

Change-Id: I8af14dc31e14d9b85d48830eee8ee20252cc14da
Reviewed-on: https://gerrit.instructure.com/29968
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jacob Fugal <jacob@instructure.com>
Product-Review: James Williams  <jamesw@instructure.com>
QA-Review: James Williams  <jamesw@instructure.com>