Adding @Beta to Intent API classes and interfaces

Change-Id: I02a3c1a678cb4e75b5bba9a33117a9dccb6fc0f5
diff --git a/core/api/src/main/java/org/onosproject/net/intent/PartitionService.java b/core/api/src/main/java/org/onosproject/net/intent/PartitionService.java
index c636cd2..7c9d547 100644
--- a/core/api/src/main/java/org/onosproject/net/intent/PartitionService.java
+++ b/core/api/src/main/java/org/onosproject/net/intent/PartitionService.java
@@ -15,11 +15,13 @@
  */
 package org.onosproject.net.intent;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.cluster.NodeId;
 
 /**
  * Service for interacting with the partition-to-instance assignments.
  */
+@Beta
 public interface PartitionService {
 
     /**