make kube-dns main dns server (Azure#153)

Author: Yongli Chen

cni/azure-windows.conflist

@@ -11,8 +11,8 @@
  },
  "dns":{
  "Nameservers":[
- "168.63.129.16",
- "10.0.0.10"
+ "10.0.0.10",
+ "168.63.129.16"
  ],
  "Search":[
  "svc.cluster.local"