add builder helpers with levels and start to separate out #filter!

spec/services/notification_service_spec.rb

@@ -309,6 +309,11 @@ describe NotificationService do
 
       before do
         build_team(note.project)
+
+        # make sure these users can read the project snippet!
+        project.add_guest(@u_guest_watcher)
+        project.add_guest(@u_guest_custom)
+
         note.project.add_master(note.author)
         reset_delivered_emails!
       end