- 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/node/registrator.go

@@ -78,7 +78,7 @@ func (r *clientRegistrator) Run(terminate <-chan struct{}) error {
 	loop := func() {
 	RegistrationLoop:
 		for {
-			obj := r.queue.CancelablePop(terminate)
+			obj := r.queue.Pop(terminate)
 			if obj == nil {
 				break RegistrationLoop
 			}