Add DomainConstraint to kryo namespaces

Change-Id: Ib94283a665a228e266c7e3e0adf1ce1f444174ce
diff --git a/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java b/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java
index 49e2969..6413037 100644
--- a/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java
+++ b/core/store/serializers/src/main/java/org/onosproject/store/serializers/KryoNamespaces.java
@@ -186,6 +186,7 @@
 import org.onosproject.net.intent.constraint.AnnotationConstraint;
 import org.onosproject.net.intent.constraint.BandwidthConstraint;
 import org.onosproject.net.intent.constraint.BooleanConstraint;
+import org.onosproject.net.intent.constraint.DomainConstraint;
 import org.onosproject.net.intent.constraint.EncapsulationConstraint;
 import org.onosproject.net.intent.constraint.HashedPathSelectionConstraint;
 import org.onosproject.net.intent.constraint.LatencyConstraint;
@@ -590,6 +591,7 @@
             .register(MarkerResource.class)
             .register(new BitSetSerializer(), BitSet.class)
             .register(DomainIntent.class)
+            .register(DomainConstraint.class)
             .register(
                     // PI model
                     PiMatchType.class,