Watch pods in executor and tell kubelet about graceful terminations

- instantiate framework.Controller for pods in the executor using framework.NewInformer,
  in order to watch pod updates for pods on that host
- forwards updates like graceful termination to the kubelet.

  This might also be the preparation for other updates which are supported by the
  kubelet.

contrib/mesos/pkg/executor/service/service.go

@@ -36,8 +36,10 @@ import (
 	"k8s.io/kubernetes/contrib/mesos/pkg/hyperkube"
 	"k8s.io/kubernetes/contrib/mesos/pkg/redirfd"
 	"k8s.io/kubernetes/pkg/api"
+	"k8s.io/kubernetes/pkg/client/cache"
 	client "k8s.io/kubernetes/pkg/client/unversioned"
 	"k8s.io/kubernetes/pkg/credentialprovider"
+	"k8s.io/kubernetes/pkg/fields"
 	"k8s.io/kubernetes/pkg/healthz"
 	"k8s.io/kubernetes/pkg/kubelet"
 	"k8s.io/kubernetes/pkg/kubelet/cadvisor"
@@ -372,6 +374,7 @@ func (ks *KubeletExecutorServer) createAndInitKubelet(
 			return klet.GetRuntime().GetPodStatus(pod)
 		},
 		StaticPodsConfigPath: staticPodsConfigPath,
+		PodLW:                cache.NewListWatchFromClient(kc.KubeClient, "pods", api.NamespaceAll, fields.OneTermEqualSelector(client.PodHost, kc.NodeName)),
 	})
 
 	go exec.InitializeStaticPodsSource(func() {