Move FacilityUsernameViewSet.queryset into method to avoid init errors
Move FacilityUsernameViewSet.queryset into method to avoid init errors

mrpau/kolibri,christianmemije/kolibri,mrpau/kolibri,indirectlylit/kolibri,indirectlylit/kolibri,christianmemije/kolibri,jonboiser/kolibri,christianmemije/kolibri,jonboiser/kolibri,christianmemije/kolibri,lyw07/kolibri,benjaoming/kolibri,indirectlylit/kolibri,learningequality/kolibri,benjaoming/kolibri,lyw07/kolibri,jonboiser/kolibri,indirectlylit/kolibri,learningequality/kolibri,benjaoming/kolibri,DXCanas/kolibri,lyw07/kolibri,lyw07/kolibri,jonboiser/kolibri,DXCanas/kolibri,benjaoming/kolibri,learningequality/kolibri,DXCanas/kolibri,learningequality/kolibri,mrpau/kolibri,mrpau/kolibri,DXCanas/kolibri