Automatic merge from submit-queue (batch tested with PRs 63658, 63509, 63800, 63586, 63840). If you want to cherry-pick this change to another branch, please follow the instructions <a href="https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md">here</a>.
kubeadm - default CoreDNS FeatureGate to true
**What this PR does / why we need it**:
This PR updates kubeadm to deploy CoreDNS rather than KubeDNS by default for new installs.
**Which issue(s) this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close the issue(s) when PR gets merged)*:
Addresses part of https://github.com/kubernetes/kubeadm/issues/782
**Release note**:
```release-note
kubeadm will now deploy CoreDNS by default instead of KubeDNS
```
Currently, this does not effect upgrades. Also, documentation updates will need to be coordinated with this change.
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