fix several users controllers things for rails 3 specs

Change-Id: I678a8c5a0c5ac1e3e7095ba61671c469e818c76c
Reviewed-on: https://gerrit.instructure.com/30123
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Jon Willesen <jonw@instructure.com>
Product-Review: Cody Cutrer <cody@instructure.com>
QA-Review: Cody Cutrer <cody@instructure.com>