One more pass at refactoring CohortImporter
One more pass at refactoring CohortImporter

adamwight/WikiEduDashboard,sejalkhatri/WikiEduDashboard,feelfreelinux/WikiEduDashboard,KarmaHater/WikiEduDashboard,alpha721/WikiEduDashboard,MusikAnimal/WikiEduDashboard,sejalkhatri/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,Wowu/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,WinnySilva/WikiEduDashboard,alpha721/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,feelfreelinux/WikiEduDashboard,ragesoss/WikiEduDashboard,alpha721/WikiEduDashboard,sejalkhatri/WikiEduDashboard,KarmaHater/WikiEduDashboard,adamwight/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,MusikAnimal/WikiEduDashboard,majakomel/WikiEduDashboard,alpha721/WikiEduDashboard,Wowu/WikiEduDashboard,WikiEducationFoundation/WikiEduDashboard,MusikAnimal/WikiEduDashboard,ragesoss/WikiEduDashboard,adamwight/WikiEduDashboard,feelfreelinux/WikiEduDashboard,MusikAnimal/WikiEduDashboard,thenickcox/WikiEduDashboard,KarmaHater/WikiEduDashboard,WinnySilva/WikiEduDashboard,sejalkhatri/WikiEduDashboard,KarmaHater/WikiEduDashboard,majakomel/WikiEduDashboard,thenickcox/WikiEduDashboard,majakomel/WikiEduDashboard,feelfreelinux/WikiEduDashboard,WinnySilva/WikiEduDashboard,Wowu/WikiEduDashboard,majakomel/WikiEduDashboard,ragesoss/WikiEduDashboard,Wowu/WikiEduDashboard,thenickcox/WikiEduDashboard,sejalkhatri/WikiEduDashboard