Support Kryo serialization for intent related types

- Implement the protected constructors
- Register the types in KryoFactory

Change-Id: I14214ed1703a8e4b3145625732c74600fc0aba06
diff --git a/src/main/java/net/onrc/onos/api/newintent/OpticalConnectivityIntent.java b/src/main/java/net/onrc/onos/api/newintent/OpticalConnectivityIntent.java
index 174d8c0..9e5c3bc 100644
--- a/src/main/java/net/onrc/onos/api/newintent/OpticalConnectivityIntent.java
+++ b/src/main/java/net/onrc/onos/api/newintent/OpticalConnectivityIntent.java
@@ -30,6 +30,15 @@
     }
 
     /**
+     * Constructor for serializer.
+     */
+    protected OpticalConnectivityIntent() {
+        super();
+        this.srcSwitchPort = null;
+        this.dstSwitchPort = null;
+    }
+
+    /**
      * Gets source transponder port.
      *
      * @return The source transponder port.