Refactor self_enrollment_controller
Refactor self_enrollment_controller

Following the extracted_method{return} pattern from here: http://blog.arkency.com/2014/07/4-ways-to-early-return-from-a-rails-controller/

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