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/operator/etcd/etcd_cluster.yml b/k8s/operator/etcd/etcd_cluster.yml
index af6aa03..904588e 100644
--- a/k8s/operator/etcd/etcd_cluster.yml
+++ b/k8s/operator/etcd/etcd_cluster.yml
@@ -1,7 +1,8 @@
 apiVersion: "etcd.database.coreos.com/v1beta2"
 kind: "EtcdCluster"
 metadata:
-  name: "etcd"
+  name: etcd
+  namespace: voltha
 spec:
   size: 3
   version: "3.2.9"