Automatic merge from submit-queue. 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>. Increase l7-lb-controller's memory check threshold in density test Reason for density test failing in our [latest 5k-node run](https://k8s-gubernator.appspot.com/build/kubernetes-jenkins/logs/ci-kubernetes-e2e-gce-scale-performance/49): ``` I1016 23:17:15.673] Container l7-lb-controller-v0.9.7-gce-scale-cluster-master/l7-lb-controller is using 3428.52734375/3075 MB of memory I1016 23:17:15.673] not to have occurred[0m ``` cc @kubernetes/sig-scalability-misc