Automatic merge from submit-queue

Use nodeutil.GetHostIP consistently when talking to nodes

Most of our communications from apiserver -> nodes used
    nodutil.GetNodeHostIP, but a few places didn't - and this meant that the
    node name needed to be resolvable _and_ we needed to populate valid IP
    addresses.

```release-note
The apiserver now uses addresses reported by the kubelet in the Node object's status for apiserver->kubelet communications, rather than the name of the Node object. The address type used defaults to `InternalIP`, `ExternalIP`, and `LegacyHostIP` address types, in that order.
```