Automatic merge from submit-queue (batch tested with PRs 46681, 46786, 46264, 46680, 46805)

Bump cluster-proportional-autoscaler to 1.1.2

From https://github.com/kubernetes-incubator/cluster-proportional-autoscaler/pull/33.

/assign @bowei 

**Release note**:

```release-note
NONE
```