- forward updated labels/annotations for downward API compat

- refactor queue.Pod construction to take functional options, privatize Pod fields
- refactor DelayFIFO and HistoricalFIFO to offer consistent, more useful Pop() funcs
- refactor pod update processing changes; long term we should somehow combine with the special pod config source that we are using for mirror pods
- task launch timer cleanup

contrib/mesos/pkg/offers/offers.go

@@ -441,7 +441,7 @@ func (s *offerStorage) ageOffers() {
 }
 
 func (s *offerStorage) nextListener() *offerListener {
-	obj := s.listeners.Pop()
+	obj := s.listeners.Pop(nil)
 	if listen, ok := obj.(*offerListener); !ok {
 		//programming error
 		panic(fmt.Sprintf("unexpected listener object %v", obj))