Adding @Beta to Intent API classes and interfaces

Change-Id: I02a3c1a678cb4e75b5bba9a33117a9dccb6fc0f5
diff --git a/core/api/src/main/java/org/onosproject/net/intent/IntentEvent.java b/core/api/src/main/java/org/onosproject/net/intent/IntentEvent.java
index 369636a..b27a507 100644
--- a/core/api/src/main/java/org/onosproject/net/intent/IntentEvent.java
+++ b/core/api/src/main/java/org/onosproject/net/intent/IntentEvent.java
@@ -15,11 +15,13 @@
  */
 package org.onosproject.net.intent;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.event.AbstractEvent;
 
 /**
  * A class to represent an intent related event.
  */
+@Beta
 public class IntentEvent extends AbstractEvent<IntentEvent.Type, Intent> {
 
     public enum Type {