Fix: correctly generate kafka message from openstack telemetry

Change-Id: Id608ef0a3dd7f18e35fc59473ee6b7ef8077ac39
diff --git a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/codec/TinaMessageByteBufferCodec.java b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/codec/TinaMessageByteBufferCodec.java
index 3b849d1..228bc2b 100644
--- a/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/codec/TinaMessageByteBufferCodec.java
+++ b/apps/openstacktelemetry/app/src/main/java/org/onosproject/openstacktelemetry/codec/TinaMessageByteBufferCodec.java
@@ -60,7 +60,7 @@
         ByteBuffer byteBuffer = ByteBuffer.allocate(flowInfos.size() * ENTRY_SIZE);
 
         TinaFlowInfoByteBufferCodec codec = new TinaFlowInfoByteBufferCodec();
-        flowInfos.forEach(flowInfo -> byteBuffer.put(codec.encode(flowInfo)));
+        flowInfos.forEach(flowInfo -> byteBuffer.put(codec.encode(flowInfo).array()));
 
         return byteBuffer.array();
     }