spec: add skips for flaky course specs
spec: add skips for flaky course specs

Change-Id: I4bff86aa1fa3df7634de59b6d8055e99c19a86a1
closes: ADMIN-3023
Reviewed-on: https://gerrit.instructure.com/c/canvas-lms/+/214633
Tested-by: Jenkins
Reviewed-by: James Butters <4c5a489c9bb72d41f20b3b22aaf4c9b864e32f20@instructure.com>
QA-Review: Steve Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>
Product-Review: Steve Shepherd <e794458448443812fb2685675aab3bbd1a3891bc@instructure.com>

instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,sfu/canvas-lms,djbender/canvas-lms,djbender/canvas-lms,sfu/canvas-lms,sfu/canvas-lms,instructure/canvas-lms,instructure/canvas-lms,djbender/canvas-lms