AETHER-1942 Add an ability to set external IP for bess-upf and pfcp-agent

Change-Id: Ic40e37d7789993c3d16a2e9062f5b0a210aa156a
diff --git a/omec/omec-user-plane/values.yaml b/omec/omec-user-plane/values.yaml
index d0ff59b..cd01432 100644
--- a/omec/omec-user-plane/values.yaml
+++ b/omec/omec-user-plane/values.yaml
@@ -88,6 +88,7 @@
 
 service:
   type: ClusterIP
+  #externalIp:
   #annotations:
 
 servicemonitor: