Fix spaces_controller imports

Author: jochenehret

app/controllers/v3/spaces_controller.rb

@@ -1,5 +1,6 @@
 require 'presenters/v3/paginated_list_presenter'
 require 'presenters/v3/space_presenter'
+require 'presenters/v3/space_usage_summary_presenter'
 require 'messages/space_create_message'
 require 'messages/space_delete_unmapped_routes_message'
 require 'messages/space_update_message'
@@ -216,7 +217,7 @@ def show_usage_summary
     space_not_found! unless space
     space_not_found! unless permission_queryer.can_read_from_space?(space.id, space.organization_id)
 
-    render status: :ok, json: Presenters::V3::SpaceUsageSummaryPresenter.new(org)
+    render status: :ok, json: Presenters::V3::SpaceUsageSummaryPresenter.new(space.org)
   end
 
   private