Adding @Beta to Intent API classes and interfaces

Change-Id: I02a3c1a678cb4e75b5bba9a33117a9dccb6fc0f5
diff --git a/core/api/src/main/java/org/onosproject/net/intent/MultiPointToSinglePointIntent.java b/core/api/src/main/java/org/onosproject/net/intent/MultiPointToSinglePointIntent.java
index b6cf0db..ac6061c 100644
--- a/core/api/src/main/java/org/onosproject/net/intent/MultiPointToSinglePointIntent.java
+++ b/core/api/src/main/java/org/onosproject/net/intent/MultiPointToSinglePointIntent.java
@@ -15,6 +15,7 @@
  */
 package org.onosproject.net.intent;
 
+import com.google.common.annotations.Beta;
 import com.google.common.base.MoreObjects;
 import com.google.common.collect.ImmutableSet;
 import com.google.common.collect.Sets;
@@ -33,6 +34,7 @@
 /**
  * Abstraction of multiple source to single destination connectivity intent.
  */
+@Beta
 public final class MultiPointToSinglePointIntent extends ConnectivityIntent {
 
     private final Set<ConnectPoint> ingressPoints;