Automatic merge from submit-queue (batch tested with PRs 58661, 58764, 58368, 58739, 58773). 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>.

Fix bug in dockerized benchmarking script

Ref https://github.com/kubernetes/test-infra/issues/6392#issuecomment-360241294

/cc @krzyzacy
/assign @gmarek  

```release-note
NONE
```