spec: verify that grading schemes is working with mgp flag
spec: verify that grading schemes is working with mgp flag

Test Plan:
- pass Jenkins
- check for syntax errors
- make sure new test_ids match up to an existing test case in TestRails

Change-Id: Ic7960ee5f8ef6f154179137983c679722a179deb
Reviewed-on: https://gerrit.instructure.com/68700
Tested-by: Jenkins
QA-Review: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>
Reviewed-by: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>
Product-Review: Caleb Guanzon <54fa1f30d451e4f3c341a8f3c47c9215fd0be9c6@instructure.com>

redconfetti/canvas-lms,matematikk-mooc/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,SwinburneOnline/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,fronteerio/canvas-lms,redconfetti/canvas-lms,venturehive/canvas-lms,djbender/canvas-lms,roxolan/canvas-lms,instructure/canvas-lms,djbender/canvas-lms,grahamb/canvas-lms,instructure/canvas-lms,roxolan/canvas-lms,grahamb/canvas-lms,SwinburneOnline/canvas-lms,SwinburneOnline/canvas-lms,dgynn/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,redconfetti/canvas-lms,roxolan/canvas-lms,sfu/canvas-lms,venturehive/canvas-lms,fronteerio/canvas-lms,HotChalk/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,HotChalk/canvas-lms,dgynn/canvas-lms,SwinburneOnline/canvas-lms,instructure/canvas-lms,HotChalk/canvas-lms,djbender/canvas-lms,dgynn/canvas-lms,redconfetti/canvas-lms,fronteerio/canvas-lms,grahamb/canvas-lms,sfu/canvas-lms,matematikk-mooc/canvas-lms,roxolan/canvas-lms,dgynn/canvas-lms,venturehive/canvas-lms,venturehive/canvas-lms,instructure/canvas-lms,HotChalk/canvas-lms,grahamb/canvas-lms,matematikk-mooc/canvas-lms,fronteerio/canvas-lms,sfu/canvas-lms