Adding @Beta to Intent API classes and interfaces

Change-Id: I02a3c1a678cb4e75b5bba9a33117a9dccb6fc0f5
diff --git a/core/api/src/main/java/org/onosproject/net/intent/IntentOperation.java b/core/api/src/main/java/org/onosproject/net/intent/IntentOperation.java
index e2c8f91..1b51b4f 100644
--- a/core/api/src/main/java/org/onosproject/net/intent/IntentOperation.java
+++ b/core/api/src/main/java/org/onosproject/net/intent/IntentOperation.java
@@ -16,6 +16,8 @@
 package org.onosproject.net.intent;
 
 
+import com.google.common.annotations.Beta;
+
 import java.util.Objects;
 
 import static com.google.common.base.MoreObjects.toStringHelper;
@@ -24,6 +26,7 @@
 /**
  * Abstraction of an intent-related operation, e.g. add, remove, replace.
  */
+@Beta
 public final class IntentOperation {
 
     private final Type type;