[VOL-2736]host and port should be specified as a single argument not as two separate arguments

Change-Id: I312fe753ac0fe62c942f335371e6449809ecfb85
diff --git a/pkg/kafka/client.go b/pkg/kafka/client.go
index 0919a0c..0d9e3a5 100755
--- a/pkg/kafka/client.go
+++ b/pkg/kafka/client.go
@@ -39,6 +39,7 @@
 const (
 	DefaultKafkaHost                = "127.0.0.1"
 	DefaultKafkaPort                = 9092
+	DefaultKafkaAddress             = DefaultKafkaHost + ":" + string(DefaultKafkaPort)
 	DefaultGroupName                = "voltha"
 	DefaultSleepOnError             = 1
 	DefaultProducerFlushFrequency   = 10