SEBA-686 Enable multiple Ponsim OLTs

Change-Id: Ia8cc47492010bcd98f0a8800f70386cd5ca5342b
diff --git a/ponnet/values.yaml b/ponnet/values.yaml
index 53e9a8a..759bd95 100644
--- a/ponnet/values.yaml
+++ b/ponnet/values.yaml
@@ -23,3 +23,5 @@
 
 global:
   namespace: voltha
+
+numOlts: 1