Add autoscalers for dnsmasq and kubedns

By default kubedns and dnsmasq scale when installed.
Dnsmasq is no longer a daemonset. It is now a deployment.
Kubedns is no longer a replicationcluster. It is now a deployment.
Minimum replicas is two (to enable rolling updates).

Reduced memory erquirements for dnsmasq and kubedns

roles/dnsmasq/tasks/pre_upgrade.yml

@@ -0,0 +1,9 @@
+---
+- name: Delete legacy dnsmasq daemonset
+  kube:
+    name: dnsmasq
+    namespace: "{{system_namespace}}"
+    kubectl: "{{bin_dir}}/kubectl"
+    resource: "ds"
+    state: absent
+  when: inventory_hostname == groups['kube-master'][0]