[VOL-4293] OpenONU Adapter update for gRPC migration

Change-Id: I05300d3b95b878f44576a99a05f53f52fdc0cda1
diff --git a/vendor/github.com/Shopify/sarama/heartbeat_response.go b/vendor/github.com/Shopify/sarama/heartbeat_response.go
index 766f5fd..577ab72 100644
--- a/vendor/github.com/Shopify/sarama/heartbeat_response.go
+++ b/vendor/github.com/Shopify/sarama/heartbeat_response.go
@@ -27,6 +27,10 @@
 	return 0
 }
 
+func (r *HeartbeatResponse) headerVersion() int16 {
+	return 0
+}
+
 func (r *HeartbeatResponse) requiredVersion() KafkaVersion {
 	return V0_9_0_0
 }