Add IdentifiedDataSerializable to hazelcast.xml config.

- There was a bug, in #718, where Serialization configuration required for datastore mode
  is missing in Hazelcast instance created for Event.
  This patch adds the required configuration to hazelcast.xml templates.

- WARNING: User need to regenerate hazelcast.xml after this patch.

Change-Id: I6f07810930457336673f7c511540e8ce1d0af746
diff --git a/src/main/java/net/onrc/onos/core/datastore/hazelcast/VersionedValueSerializableFactory.java b/src/main/java/net/onrc/onos/core/datastore/hazelcast/VersionedValueSerializableFactory.java
index 75bd568..7177695 100644
--- a/src/main/java/net/onrc/onos/core/datastore/hazelcast/VersionedValueSerializableFactory.java
+++ b/src/main/java/net/onrc/onos/core/datastore/hazelcast/VersionedValueSerializableFactory.java
@@ -3,11 +3,20 @@
 import com.hazelcast.nio.serialization.DataSerializableFactory;
 import com.hazelcast.nio.serialization.IdentifiedDataSerializable;
 
+/**
+ * IdentifiedDataSerializableFactory for HZTable.VersionedValue class.
+ */
 public class VersionedValueSerializableFactory implements
         DataSerializableFactory {
     // revisit these magic numbers
+    /**
+     * IdentifiedDataSerializable Factory ID.
+     */
     public static final int FACTORY_ID = 1;
 
+    /**
+     * IdentifiedDataSerializable type ID for HZTable.VersionedValue class.
+     */
     public static final int VERSIONED_VALUE_ID = 1;
 
     @Override
@@ -20,5 +29,4 @@
                 return null;
         }
     }
-
 }