Add namespace to etcd cluster definition

etcd operator won't create etcd-cluster if they are in different
namespaces

Change-Id: I30a1356f65db65e85245c82aa784fb821677e27b
Closes-Bug: PROD-14927
diff --git a/kubernetes/files/kube-addons/coredns/coredns-etcd-cluster.yaml b/kubernetes/files/kube-addons/coredns/coredns-etcd-cluster.yaml
index 8fd6059..50e2383 100644
--- a/kubernetes/files/kube-addons/coredns/coredns-etcd-cluster.yaml
+++ b/kubernetes/files/kube-addons/coredns/coredns-etcd-cluster.yaml
@@ -3,6 +3,7 @@
 apiVersion: etcd.database.coreos.com/v1beta2
 kind: EtcdCluster
 metadata:
+  namespace: {{ common.addons.coredns.namespace }}
   name: coredns-etcd-cluster
   labels:
     app: coredns-etcd-operator