add tenant metadata for replicationcontroller and it's pods

[carmark]

Test Request

root@ubuntu:/home/lei/src/k8s.io/kubernetes# kubectl describe rc
Name:       nginx
Namespace:  test
Image(s):   nginx
Selector:   app=nginx
Labels:     app=nginx
Replicas:   3 current / 3 desired
Pods Status:    3 Running / 0 Waiting / 0 Succeeded / 0 Failed
No volumes.
Events:
  FirstSeen LastSeen    Count   From                SubobjectPath   Reason          Message
  ─────────   ────────    ───── ────                ───────────── ──────          ───────
  30m       30m     1   {replication-controller }           SuccessfulCreate    Created pod: nginx-ljuuj
  30m       30m     1   {replication-controller }           SuccessfulCreate    Created pod: nginx-gp4bi
  30m       30m     1   {replication-controller }           SuccessfulCreate    Created pod: nginx-cq0ye

root@ubuntu:/home/lei/src/k8s.io/kubernetes# kubectl describe rc nginx --namespace=test
Name:       nginx
Namespace:  test
Image(s):   nginx
Selector:   app=nginx
Labels:     app=nginx
Replicas:   3 current / 3 desired
Pods Status:    3 Running / 0 Waiting / 0 Succeeded / 0 Failed
No volumes.
Events:
  FirstSeen LastSeen    Count   From                SubobjectPath   Reason          Message
  ─────────   ────────    ───── ────                ───────────── ──────          ───────
  30m       30m     1   {replication-controller }           SuccessfulCreate    Created pod: nginx-ljuuj
  30m       30m     1   {replication-controller }           SuccessfulCreate    Created pod: nginx-gp4bi
  30m       30m     1   {replication-controller }           SuccessfulCreate    Created pod: nginx-cq0ye

root@ubuntu:/home/lei/src/k8s.io/kubernetes# kubectl describe pods nginx-ljuuj --namespace=test
Name:               nginx-ljuuj
Namespace:          test
Image(s):           nginx
Node:               127.0.0.1/127.0.0.1
Start Time:         Sun, 25 Oct 2015 08:40:48 +0800
Labels:             app=nginx
Status:             Running
Reason:
Message:
IP:             172.17.0.18
Replication Controllers:    nginx (3/3 replicas created)
Containers:
  nginx:
    Container ID:   docker://6fa874186bbef3456525c0256b6122f8d50a313ef074f233d43e82c4c151be2d
    Image:      nginx
    Image ID:       docker://0b354d33906d30ac52d2817ea770ddce18c7531e58b5b3ca0ae78873f5d2e207
    QoS Tier:
      cpu:      BestEffort
      memory:       BestEffort
    State:      Running
      Started:      Sun, 25 Oct 2015 08:40:49 +0800
    Ready:      True
    Restart Count:  0
    Environment Variables:
Conditions:
  Type      Status
  Ready     True
Volumes:
  default-token-qftna:
    Type:   Secret (a secret that should populate this volume)
    SecretName: default-token-qftna
Events:
  FirstSeen LastSeen    Count   From            SubobjectPath               Reason      Message
  ─────────   ────────    ───── ────            ─────────────             ──────      ───────
  30m       30m     1   {scheduler }                            Scheduled   Successfully assigned nginx-ljuuj to 127.0.0.1
  30m       30m     1   {kubelet 127.0.0.1} implicitly required container POD   Pulled      Container image "gcr.io/google_containers/pause:0.8.0" already present on machine
  30m       30m     1   {kubelet 127.0.0.1} implicitly required container POD   Created     Created with docker id 9914a8fc8439
  30m       30m     1   {kubelet 127.0.0.1} implicitly required container POD   Started     Started with docker id 9914a8fc8439
  30m       30m     1   {kubelet 127.0.0.1} spec.containers{nginx}          Pulled      Container image "nginx" already present on machine
  30m       30m     1   {kubelet 127.0.0.1} spec.containers{nginx}          Created     Created with docker id 6fa874186bbe
  30m       30m     1   {kubelet 127.0.0.1} spec.containers{nginx}          Started     Started with docker id 6fa874186bbe