Automatic merge from submit-queue (batch tested with PRs 67062, 67169, 67539, 67504, 66876). 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>.

Decrease CPU requests of master components in two times.

**What this PR does / why we need it**:
Decreases cpu request of each master component by two. This allows to schedule more components on the master node in case of one-core machines. At the same time it doesn't change current cpu share that each component receives (https://kubernetes.io/docs/concepts/configuration/manage-compute-resources-container/#how-pods-with-resource-limits-are-run).

```release-note
NONE
```