Update ProtoBuf 3 & gRPC

- Protocol Buffers: 3.0.0
- gRPC: 1.0.0-pre2

Change-Id: Ic80d3f660d4a0aa37a99d4e6d4dc45e0b70b073b
diff --git a/apps/kafka-integration/core/src/main/java/org/onosproject/kafkaintegration/impl/KafkaPublisherManager.java b/apps/kafka-integration/core/src/main/java/org/onosproject/kafkaintegration/impl/KafkaPublisherManager.java
index 104619a..39c23f3 100644
--- a/apps/kafka-integration/core/src/main/java/org/onosproject/kafkaintegration/impl/KafkaPublisherManager.java
+++ b/apps/kafka-integration/core/src/main/java/org/onosproject/kafkaintegration/impl/KafkaPublisherManager.java
@@ -22,7 +22,7 @@
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
-import com.google.protobuf.GeneratedMessage;
+import com.google.protobuf.GeneratedMessageV3;
 
 /**
  * Dispatch ONOS Events to all interested Listeners.
@@ -53,7 +53,7 @@
     }
 
     @Override
-    public void publish(Type eventType, GeneratedMessage message) {
+    public void publish(Type eventType, GeneratedMessageV3 message) {
         log.debug("Dispatching ONOS Event {}", eventType);
         post(new OnosEvent(eventType, message));
     }