Device Anti-Entropy

- create Advertisement
- handler for Advertisement
- register handler, background thread to send advertisement

Change-Id: I99e8a7d68747970c34b3c25c6d0489769d251446
diff --git a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/KryoPoolUtil.java b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/KryoPoolUtil.java
index 0c33cfe..f079874 100644
--- a/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/KryoPoolUtil.java
+++ b/core/store/serializers/src/main/java/org/onlab/onos/store/serializers/KryoPoolUtil.java
@@ -25,6 +25,7 @@
 import org.onlab.onos.net.device.DefaultDeviceDescription;
 import org.onlab.onos.net.device.DefaultPortDescription;
 import org.onlab.onos.net.provider.ProviderId;
+import org.onlab.onos.store.Timestamp;
 import org.onlab.packet.IpAddress;
 import org.onlab.packet.IpPrefix;
 import org.onlab.util.KryoPool;
@@ -63,7 +64,9 @@
                     Port.class,
                     DefaultPortDescription.class,
                     Element.class,
-                    Link.Type.class
+                    Link.Type.class,
+                    Timestamp.class
+
                     )
             .register(URI.class, new URISerializer())
             .register(NodeId.class, new NodeIdSerializer())