[CORD-197] Properly handles a flow with empty instruction

Change-Id: Ia465fdc8df1dca7a46249cd4cd8d41faf8461c3a
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 968db0e..4734672 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
@@ -339,6 +339,7 @@
                     Criterion.Type.class,
                     DefaultTrafficTreatment.class,
                     Instructions.DropInstruction.class,
+                    Instructions.NoActionInstruction.class,
                     Instructions.OutputInstruction.class,
                     Instructions.GroupInstruction.class,
                     Instructions.TableTypeTransition.class,