Add TruncateInstruction to API KryoNamespace

Change-Id: I994a74f158fe8c23143082cd8d72021ae48e36af
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 38ea7a7..9b2f348 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
@@ -444,6 +444,7 @@
                     URL.class,
                     Instructions.MeterInstruction.class,
                     Instructions.StatTriggerInstruction.class,
+                    Instructions.TruncateInstruction.class,
                     StatTriggerFlag.class,
                     StatTriggerField.class,
                     MeterCellId.class,