Change PathIntent class to be self-contained class

Change-Id: I67e768bd6be8430bb83b48963cf3c7cc4c592790
diff --git a/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java b/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java
index 2677942..4b324df 100644
--- a/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java
+++ b/src/main/java/net/onrc/onos/intent/ShortestPathIntent.java
@@ -17,8 +17,7 @@
 	/**
 	 * Default constructor for Kryo deserialization
 	 */
-	@Deprecated
-	public ShortestPathIntent() {
+	protected ShortestPathIntent() {
 	}
 
 	public ShortestPathIntent(String id,