fix failing gradebook spec
fix failing gradebook spec

Change-Id: I19b9e4c75c722107000704c5fdd570a82b2201a3
Reviewed-on: https://gerrit.instructure.com/23632
Tested-by: Jenkins <d95b56ce41a2e1ac4cecdd398defd7414407cc08@instructure.com>
Reviewed-by: Bryan Madsen <0a3ba1af216659500dd8f41e29f3979f42452870@instructure.com>
Product-Review: Bryan Madsen <0a3ba1af216659500dd8f41e29f3979f42452870@instructure.com>
QA-Review: Bryan Madsen <0a3ba1af216659500dd8f41e29f3979f42452870@instructure.com>

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