Automatic merge from submit-queue

Nodecontroller doesn't flip readiness on pods if kubeletVersion < 1.2.0

Older versions of the kubelet didn't know how to reconcile pod.Status, so the nodecontroller would mark pods NotReady on netsplit, and if the partition recovered in < 5m, the pods would never get marked Ready resulting in NotReady endpoints indefinitely (till kubelet restart/pod recreate etc).