Automatic merge from submit-queue. If you want to cherry-pick this change to another branch, please follow the instructions here: https://github.com/kubernetes/community/blob/master/contributors/devel/cherry-picks.md.

Update resource-consumer usage

**What this PR does / why we need it**:

The e2e tests are using version 1.3 of resource-consumer from
gcr.io/kubernetes-e2e-test-images since [1]. In addition, HPA
works fine for a deployment with --requrests flag.
So this updates the README.md for fitting current condition.

[1]: https://github.com/kubernetes/kubernetes/blob/master/test/utils/image/manifest.go#L86

**Release note**: NONE