make minimal config only use 1 pon and 1 onu for bbsim
diff --git a/minimal-values.yaml b/minimal-values.yaml
index 735ba1c..8cebab4 100644
--- a/minimal-values.yaml
+++ b/minimal-values.yaml
@@ -41,3 +41,5 @@
 
 # Customization for BBSIM
 kafka_broker: 'voltha-kafka.voltha.svc.cluster.local:9092'
+pon_ports: 1
+onus_per_pon_port: 1