VOL-569: Create kubernetes deployment configuration for each voltha service

This update:
- renames all voltha images referenced in kubernetes deployment files
  to the 'voltha-<component>' format
- adds the kubernetes deployment files for grafana, dashd, and shovel
- adds deployment files for an Ingress resource and an nginx-based ingress
  controller to allow access to the Consul and Grafana UIs from outside
  the cluster

Manifest file ingress/05-namespace.yml sets up a namespace 'ingress-nginx'
for all ingress-related resources. This file will be deleted once we move
all voltha components, including ingress, to a 'voltha' namespace.

Deployment instructions for the ingress resources are provided in README.md.

Change-Id: I0459e838318c43e21f40e83b314f77fc9e0456f8
diff --git a/k8s/ingress/70-service-ingress-nginx.yml b/k8s/ingress/70-service-ingress-nginx.yml
new file mode 100644
index 0000000..9a1cfa9
--- /dev/null
+++ b/k8s/ingress/70-service-ingress-nginx.yml
@@ -0,0 +1,18 @@
+apiVersion: v1
+kind: Service
+metadata:
+  name: ingress-nginx
+  namespace: ingress-nginx
+spec:
+  type: NodePort
+  selector:
+    app: ingress-nginx
+  ports:
+  - name: http
+    port: 80
+    nodePort: 30080
+    targetPort: http
+  - name: https
+    port: 443
+    nodePort: 30443
+    targetPort: https