Update users_controller_spec for course approval requirement
Update users_controller_spec for course approval requirement

Courses must be approved (ie, in a cohort) or a user will not be allowed to enroll.

KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,majakomel/WikiEduDashboard,alpha721/WikiEduDashboard,Wowu/WikiEduDashboard,Wowu/WikiEduDashboard,alpha721/WikiEduDashboard,feelfreelinux/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,Wowu/WikiEduDashboard,KarmaHater/WikiEduDashboard,sejalkhatri/WikiEduDashboard,sejalkhatri/WikiEduDashboard,sejalkhatri/WikiEduDashboard,majakomel/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,alpha721/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,feelfreelinux/WikiEduDashboard,majakomel/WikiEduDashboard,Wowu/WikiEduDashboard,KarmaHater/WikiEduDashboard,feelfreelinux/WikiEduDashboard,majakomel/WikiEduDashboard,alpha721/WikiEduDashboard,feelfreelinux/WikiEduDashboard