ONOS-2298: Tag @Beta to resource request/allocation types

Change-Id: I03fd59a74b1ed16b452b51e098e98db3e6bc43f5
diff --git a/core/api/src/main/java/org/onosproject/net/resource/ResourceRequest.java b/core/api/src/main/java/org/onosproject/net/resource/ResourceRequest.java
index 0d9e61e..fb53f12 100644
--- a/core/api/src/main/java/org/onosproject/net/resource/ResourceRequest.java
+++ b/core/api/src/main/java/org/onosproject/net/resource/ResourceRequest.java
@@ -15,9 +15,12 @@
  */
 package org.onosproject.net.resource;
 
+import com.google.common.annotations.Beta;
+
 /**
  * Abstraction of resource request.
  */
+@Beta
 public interface ResourceRequest {
     /**
      * Returns the resource type.