Automatic merge from submit-queue (batch tested with PRs 50749, 52869, 53359). 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: Change the marshal code to use ApiMachinery code.

**What this PR does / why we need it**:
The PR change the k8s obj marshaling to use ApiMachinery code instead of plain yaml.Marshal which is known to have some side-effect.

**Which issue this PR fixes** *(optional, in `fixes #<issue number>(, fixes #<issue_number>, ...)` format, will close that issue when PR gets merged)*: fixes #
fixes kubernetes/kubeadm#453
 
**Special notes for your reviewer**:

**Release note**:

```release-note
NONE
```