[VOL-4285] Helm charts for grpc migration

Change-Id: Ifa3423b43b236bab6c9de437b1dd7045069fe5de
diff --git a/voltha/templates/api-svc.yaml b/voltha/templates/api-svc.yaml
index 7edc0ea..add4aba 100644
--- a/voltha/templates/api-svc.yaml
+++ b/voltha/templates/api-svc.yaml
@@ -19,7 +19,7 @@
   namespace: "{{ .Release.Namespace }}"
 spec:
   ports:
-    - name: grpc
+    - name: nbi-grpc
       port: 55555
       targetPort: 50057
   selector: