redis-master doesn't demonstrate best practices, with respect to Kubernetes and Redis.

Kubernetes: redis-master is a naked pod with no replication controller. If the node dies, the service is toast.

Redis: IIUC, redis-master doesn't take advantage of Redis's HA features, such as sentinel

Persistence is more questionable, but that's another feature we could incorporate into the example, esp. once we support durable data.

We should also remove hostPort from examples