Automatic merge from submit-queue [Garbage Collector] add e2e tests again #27151 is reverted because gke didn't start correctly after it's merged (https://github.com/kubernetes/kubernetes/pull/27151#issuecomment-233030686). The possible problem is the `unbound variable`, which is fixed in the second commit of this PR. However, I cannot verify if the PR will fail the gke suite since I don't have the environment to run that suite. @wojtek-t @lavalamp