KeyError on "labels" when metadata does not have the labels attribute in k8s yml file

[Vedamurthy Joshi]

R4.0 3028

In the below example, metadata does not have labels attribute
----
Such a pod would not get the IP, and we see the below keyError

root@vedu-vm1-1:/# tail -f /var/log/contrail/contrail-kube-manager-stdout.log
Traceback (most recent call last):
  File "/usr/lib/python2.7/dist-packages/gevent/greenlet.py", line 327, in run
    result = self._run(*self.args, **self.kwargs)
  File "/usr/lib/python2.7/dist-packages/kube_manager/vnc/vnc_kubernetes.py", line 208, in vnc_process
    self.pod_mgr.process(event)
  File "/usr/lib/python2.7/dist-packages/kube_manager/vnc/vnc_pod.py", line 200, in process
    labels = event['object']['metadata']['labels']
KeyError: 'labels'
---------
[root@vedu-vm1-1 centos]# cat busybox.yaml
apiVersion: v1
kind: Pod
metadata:
  name: busybox
  namespace: default
spec:
  containers:
  - image: busybox
    command:
      - sleep
      - "3600"
    imagePullPolicy: IfNotPresent
    name: busybox
  restartPolicy: Always
[root@vedu-vm1-1 centos]#

[OpenContrail Admin (ci-admin-f)]

Review in progress for https://review.opencontrail.org/28209
Submitter: Vedamurthy Joshi (<email address hidden>)

[OpenContrail Admin (ci-admin-f)]

Reviewed: https://review.opencontrail.org/28209
Committed: http://github.org/Juniper/contrail-controller/commit/0e24aa1a93bc0c02e2be44414075471475e4c601
Submitter: Zuul (<email address hidden>)
Branch: master

commit 0e24aa1a93bc0c02e2be44414075471475e4c601
Author: Vedu Joshi <email address hidden>
Date: Thu Jan 26 04:42:38 2017 +0530

labels need not be defined in kube inputs

Avoid hitting KeyError

Change-Id: I941bbbe1f647c9fdc887ed50b8ab30eaa4f21725
Closes-Bug: 1659436