Use LinkEvent class instead of Link class for elements of Path

Change-Id: Iaf40f6e21d7cc411476909d3a3f32746787e16a6
diff --git a/src/main/java/net/onrc/onos/intent/Intent.java b/src/main/java/net/onrc/onos/intent/Intent.java
index 002d6f6..20088bd 100644
--- a/src/main/java/net/onrc/onos/intent/Intent.java
+++ b/src/main/java/net/onrc/onos/intent/Intent.java
@@ -3,7 +3,7 @@
 /**
  * @author Toshio Koide (t-koide@onlab.us)
  */
-public class Intent {	
+public class Intent {
 	public enum IntentState {
 		CREATED,
 		INST_REQ,
@@ -50,7 +50,7 @@
 	public int hashCode() {
 		return id.hashCode();
 	}
-	
+
 	@Override
 	public String toString() {
 		return id.toString() + ", " + state.toString();