[VOL-2961] Added BBSim parameter for kafka topic configuration

Change-Id: I93b4967a490dbbe380f5db9937307f9802a9fb84
diff --git a/bbsim/values.yaml b/bbsim/values.yaml
index ae910f8..03657d1 100644
--- a/bbsim/values.yaml
+++ b/bbsim/values.yaml
@@ -37,7 +37,7 @@
 s_tag_allocation: shared
 sadisFormat: att
 log_level: '{{ .Values.defaults.log_level }}'
-
+kafkaEventTopic: ""
 
 # TODO read this values in the config
 olt_tcp_port: 50060