Support for a distributed queue primitive.

Change-Id: I13abb93ec1703105ff0137e137738483a5b6a143
diff --git a/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseSerializer.java b/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseSerializer.java
index 9b6a322..db28826 100644
--- a/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseSerializer.java
+++ b/core/store/dist/src/main/java/org/onosproject/store/consistent/impl/DatabaseSerializer.java
@@ -21,6 +21,7 @@
 import org.apache.commons.lang3.tuple.ImmutablePair;
 import org.apache.commons.lang3.tuple.Pair;
 import org.onlab.util.KryoNamespace;
+import org.onosproject.cluster.NodeId;
 import org.onosproject.store.serializers.KryoNamespaces;
 import org.onosproject.store.serializers.KryoSerializer;
 import org.onosproject.store.service.DatabaseUpdate;
@@ -78,6 +79,7 @@
             .register(Result.Status.class)
             .register(DefaultTransaction.class)
             .register(Transaction.State.class)
+            .register(NodeId.class)
             .build();
 
     private static final KryoSerializer SERIALIZER = new KryoSerializer() {