fix AuditorApiControllerSpec

Change-Id: Ib9db48b357f8b4f2e0e333d07dbb4ac9533d2660
Reviewed-on: https://gerrit.instructure.com/29797
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>