spec: ignore fragile spec for now

Change-Id: I8d23885d7f774c688a1f3894d0edf30e36a997f5
Reviewed-on: https://gerrit.instructure.com/28852
Tested-by: Jenkins <jenkins@instructure.com>
Reviewed-by: Bryan Madsen <bryan@instructure.com>
QA-Review: Bryan Madsen <bryan@instructure.com>
Product-Review: Bryan Madsen <bryan@instructure.com>