Fix flapping feature spec
Fix flapping feature spec

When it is called in the `within` block, this is a race condition that fails if the My Exercise component goes away before the expectation is evaluated.

WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard