New playbooks for k8s service and examples

- kubedns moved to playbooks dir
- new ansible playbooks added for kubedash and kube-dashboard
- examples for k8s deployments and services added

examples/kubernetes/external-nginx/nginx-frontend.yaml

@@ -0,0 +1,22 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: nginx-frontend
+  labels:
+    app: nginx-frontend
+    tier: frontend
+spec:
+  externalIPs:
+  - 10.210.0.12
+  - 10.210.0.13
+  - 10.210.0.14
+  - 10.210.0.15
+  - 10.210.0.16
+  - 10.210.0.17
+  ports:
+  - name: http
+    port: 80
+    protocol: TCP
+    targetPort: 80
+  selector:
+    app: nginx-backend