update rules for kubernetes 1.14

[phisco]

https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.14.md#no-really-you-must-read-this-before-you-upgrade

Any Prometheus queries that match pod_name and container_name labels (e.g. cadvisor or kubelet probe metrics) should be updated to use pod and container instead. pod_name and container_name labels will be present alongside pod and container labels for one transitional release and removed in the future. (#69099, @ehashman)