VOL-2891 create template to use service name not port num

Change-Id: I741e36518664a23c9d493f066328c81a0f556782
diff --git a/voltha/templates/rw-core.yaml b/voltha/templates/rw-core.yaml
index fd8ad19..fabeb3e 100644
--- a/voltha/templates/rw-core.yaml
+++ b/voltha/templates/rw-core.yaml
@@ -111,7 +111,7 @@
             - "-banner=true"
             - "-kafka_adapter_host={{ .Values.services.kafka.adapter.service }}"
             - "-kafka_adapter_port={{ .Values.services.kafka.adapter.port }}"
-            - "-kafka_cluster_host={{ .Values.services.kafka.cluster.port }}"
+            - "-kafka_cluster_host={{ .Values.services.kafka.cluster.service }}"
             - "-kafka_cluster_port={{ .Values.services.kafka.cluster.port }}"
             - "-rw_core_topic=rwcore"
             - "-core_pair_topic=core-pair-1"