Register FlowId to Kryo

Change-Id: Ic6bff17cff78f8b95350a97e89782e9c6ae8ce7e
diff --git a/core/store/serializers/src/test/java/org/onlab/onos/store/serializers/KryoSerializerTest.java b/core/store/serializers/src/test/java/org/onlab/onos/store/serializers/KryoSerializerTest.java
index ac427cc..f76513d 100644
--- a/core/store/serializers/src/test/java/org/onlab/onos/store/serializers/KryoSerializerTest.java
+++ b/core/store/serializers/src/test/java/org/onlab/onos/store/serializers/KryoSerializerTest.java
@@ -25,6 +25,7 @@
 import org.onlab.onos.net.LinkKey;
 import org.onlab.onos.net.PortNumber;
 import org.onlab.onos.net.SparseAnnotations;
+import org.onlab.onos.net.flow.FlowId;
 import org.onlab.onos.net.provider.ProviderId;
 import org.onlab.packet.ChassisId;
 import org.onlab.packet.IpAddress;
@@ -192,6 +193,11 @@
     }
 
     @Test
+    public void testFlowId() {
+        testSerialized(FlowId.valueOf(0x12345678L));
+    }
+
+    @Test
     public void testAnnotations() {
         // Annotations does not have equals defined, manually test equality
         final byte[] a1Bytes = serializer.encode(A1);