Automatic merge from submit-queue (batch tested with PRs 61644, 61624, 61743, 61019, 61287). 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 support for setting a custom rate limiter in gce cloud provider **What this PR does / why we need it**: This PR makes it possible to use a custom rate limiter for the GCE cloud provider layer. This is a copy of the raw vendor patch made in https://github.com/kubernetes/ingress-gce/pull/148. Fixes: https://github.com/kubernetes/ingress-gce/issues/154 **Special notes for your reviewer**: **Release note**: ```release-note None ``` /assign @bowei