Upgrade kops-based clusters to Kubernetes 1.11.10

We are in the process of upgrading our kops-managed Kubernetes clusters from v1.11.9 to v1.11.10. This is a bug fix release.

For the complete Kubernetes 1.11.10 changelog, see https://github.com/kubernetes/kubernetes/blob/master/CHANGELOG-1.11.md#v11110.

We’re in the process of upgrading all staging clusters. Production clusters will follow next week.