[VOL-1462] Sync data between two voltha cores in the same pair

This commit consists of the following updates:
1) Background data syncing between two cores after a transaction
is completed by one core.
2) Add transaction management to southbound APIs (adapter facing).
This is enabled got adapter registration only for now.
3) Fix an issue with flow decomposition
4) Add the rough-in to allow a packet to be send to an OFAgent
with a transaction ID.  Two cores can therefore send the same
packet and let the OFAgent discard the duplicate.  The work in
OFAgent remains.
5) Cleanups

Change-Id: Ibe9d75edb66cfd6a0954bdfeb16a7e7c8a3c53b6
diff --git a/kafka/sarama_client.go b/kafka/sarama_client.go
index 55c68a3..698fefa 100644
--- a/kafka/sarama_client.go
+++ b/kafka/sarama_client.go
@@ -459,7 +459,7 @@
 	// TODO: Use a lock or a different mechanism to ensure the response received corresponds to the message sent.
 	select {
 	case ok := <-sc.producer.Successes():
-		log.Debugw("message-sent", log.Fields{"status": ok})
+		log.Debugw("message-sent", log.Fields{"status": ok.Topic})
 	case notOk := <-sc.producer.Errors():
 		log.Debugw("error-sending", log.Fields{"status": notOk})
 		return notOk
@@ -786,7 +786,7 @@
 				// Channel closed
 				break startloop
 			}
-			log.Debugw("message-received", log.Fields{"msg": msg, "receivedTopic": msg.Topic})
+			log.Debugw("message-received", log.Fields{"timestamp": msg.Timestamp, "receivedTopic": msg.Topic})
 			msgBody := msg.Value
 			icm := &ic.InterContainerMessage{}
 			if err := proto.Unmarshal(msgBody, icm); err != nil {