Fixing @Beta tags

Change-Id: I93a3be9a81a8f29f7b1ce29b66f09c9bcd31e639
diff --git a/core/api/src/main/java/org/onosproject/security/AppPermission.java b/core/api/src/main/java/org/onosproject/security/AppPermission.java
index 21a70d2..09fe17a 100644
--- a/core/api/src/main/java/org/onosproject/security/AppPermission.java
+++ b/core/api/src/main/java/org/onosproject/security/AppPermission.java
@@ -16,11 +16,14 @@
 
 package org.onosproject.security;
 
+import com.google.common.annotations.Beta;
+
 import java.security.BasicPermission;
 
 /**
  * Implementation of API access permission.
  */
+@Beta
 public class AppPermission extends BasicPermission {
 
     public enum Type {