Expose Shutdown func for EventBroadcaster

Kubernetes-commit: 57d43e4946f352f075b219b0a2f35942b06cfeb9

tools/events/event_broadcaster.go

@@ -102,6 +102,10 @@ func newBroadcaster(sink EventSink, sleepDuration time.Duration, eventCache map[
 	}
 }
 
+func (e *eventBroadcasterImpl) Shutdown() {
+	e.Broadcaster.Shutdown()
+}
+
 // refreshExistingEventSeries refresh events TTL
 func (e *eventBroadcasterImpl) refreshExistingEventSeries() {
 	// TODO: Investigate whether lock contention won't be a problem

tools/events/interfaces.go

@@ -54,6 +54,9 @@ type EventBroadcaster interface {
 	// NOTE: events received on your eventHandler should be copied before being used.
 	// TODO: figure out if this can be removed.
 	StartEventWatcher(eventHandler func(event runtime.Object)) func()
+
+	// Shutdown shuts down the broadcaster
+	Shutdown()
 }
 
 // EventSink knows how to store events (client-go implements it.)