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

This update:
- organizes all Voltha components under their own namespace, "voltha". If
  you have a script for deploying Voltha, then add namespace.yml at the top.
- adds host volume mounts for Consul's data and config directories
- fixes a bug in Envoy where it was aborting because it couldn't find Consul
  even though it was getting the Voltha assignments from Etcd.

Change-Id: I45eaf2d65428c0184df06971ce3797b9122d3055
diff --git a/k8s/envoy_for_etcd.yml b/k8s/envoy_for_etcd.yml
index 2b7537c..af5c1f4 100644
--- a/k8s/envoy_for_etcd.yml
+++ b/k8s/envoy_for_etcd.yml
@@ -2,6 +2,7 @@
 kind: Service
 metadata:
   name: voltha
+  namespace: voltha
   labels:
     name: voltha
 spec:
@@ -26,6 +27,7 @@
 kind: Deployment
 metadata:
   name: voltha
+  namespace: voltha
 spec:
   replicas: 1
   template:
@@ -50,7 +52,7 @@
             - "-envoy-cfg-template=/envoy/voltha-grpc-proxy.template.json"
             - "-envoy-config=/envoy/voltha-grpc-proxy.json"
             - "-kv=etcd"
-            - "-kv-svc-name=etcd"
+            - "-kv-svc-name=etcd.$(NAMESPACE).svc.cluster.local"
             - "-kv-port=2379"
           ports:
             - containerPort: 8882