
Automatic merge from submit-queue (batch tested with PRs 60585, 62398, 62258, 62042). 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>. Add e2e test for kubedns to forward PTR records to upstream server. **What this PR does / why we need it**: Add e2e test for kubedns to forward PTR records to upstream server. **Release note**: ```release-note NONE ```