* Fix random failure in debug: var=result.content|from_json
* netchecker agents are deployed on all k8s-cluster group members
* reducing limits/requests is not enough, switching to n1-standard-2
* gce_centos7 need more cpu
* Enable AutoScaler for CoreDNS
* Only use one template for dns autoscaler
* Rename a few variables for replicas and minimum pods
* Rename a few variables for replicas and minimum pods
* Remove replicas to make autoscale work
* Cleanup kubedns-autoscaler as it has been renamed