Update CoreDNS templates to newest version and fix kubedns-autoscaler (#3483)

* Update CoreDNS templates to newest version

* Add watch to ClusterRole. Fixes #3460

roles/kubernetes-apps/ansible/templates/coredns-config.yml.j2

@@ -4,8 +4,6 @@ kind: ConfigMap
 metadata:
   name: coredns
   namespace: kube-system
-  labels:
-    addonmanager.kubernetes.io/mode: EnsureExists
 data:
   Corefile: |
     .:53 {
@@ -27,4 +25,7 @@ data:
         proxy . /etc/resolv.conf
 {% endif %}
         cache 30
+        loop
+        reload
+        loadbalance
     }