Bug fixes for the centec and noviflow pipelines.

Change-Id: Id0531e54060ff8e2a2321f6c49c8c16e32be45f8
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 00fa550..4eb8c7a 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
@@ -329,6 +329,7 @@
                     L2ModificationInstruction.PushHeaderInstructions.class,
                     L2ModificationInstruction.ModVlanIdInstruction.class,
                     L2ModificationInstruction.ModVlanPcpInstruction.class,
+                    L2ModificationInstruction.PopVlanInstruction.class,
                     L2ModificationInstruction.ModMplsLabelInstruction.class,
                     L2ModificationInstruction.ModMplsTtlInstruction.class,
                     L3ModificationInstruction.class,