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include node internal ip as additional information for kubectl
**What this PR does / why we need it**:
Node external ip is only available for cloud-based cluster.
This PR does extend showing node internal ip for baremental clusters, where external ip is always shown as `<none>`.
Before the change,
```
$ kubectl get node -o wide
NAME STATUS AGE VERSION EXTERNAL-IP OS-IMAGE KERNEL-VERSION
server-01 Ready 21d v1.9.0 <none> Ubuntu 16.04.2 LTS 4.4.0-83-generic
server-02 Ready 21d v1.9.0 <none> Ubuntu 16.04.2 LTS 4.4.0-83-generic
```
After the change,
```
$ kubectl get node -o wide
NAME STATUS ROLES AGE VERSION INTERNAL-IP EXTERNAL-IP OS-IMAGE KERNEL-VERSION CONTAINER-RUNTIME
server-01 Ready master 21d v1.9.0 192.168.31.100 <none> Ubuntu 16.04.2 LTS 4.4.0-83-generic docker://1.13.1
server-02 Ready <none> 21d v1.9.0 192.168.31.101 <none> Ubuntu 16.04.2 LTS 4.4.0-83-generic docker://1.13.1
```
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Fixes #
**Special notes for your reviewer**:
/cc @kubernetes/sig-cli-pr-reviews
**Release note**:
```release-note
include node internal ip as additional information for kubectl
```
008dafe05a