Automatic merge from submit-queue

Fix problems of not-starting image pullers

In e2e.go there are the following lines:
https://github.com/kubernetes/kubernetes/blob/master/test/e2e/e2e.go#L150
```
	if err := framework.WaitForPodsSuccess(c, metav1.NamespaceSystem, framework.ImagePullerLabels, imagePrePullingTimeout); err != nil {
		// There is no guarantee that the image pulling will succeed in 3 minutes
		// and we don't even run the image puller on all platforms (including GKE).
		// We wait for it so we get an indication of failures in the logs, and to
		// maximize benefit of image pre-pulling.
		framework.Logf("WARNING: Image pulling pods failed to enter success in %v: %v", imagePrePullingTimeout, err)
	}
```

However, few lines above:
https://github.com/kubernetes/kubernetes/blob/master/test/e2e/e2e.go#L143

we were waiting for all image pullers to actually enter Success state. It's pretty clear that the latter wasn't expected.

This PR is fixing this problem.

Ref #43728

@anhowe @davidopp