Adding @Beta to LabelResourceService and other interfaces in API package

Change-Id: Ic959bd78e60be6995648649db69556e543a25325
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceDelegate.java b/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceDelegate.java
index 25287b9..ea053af 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceDelegate.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResourceDelegate.java
@@ -1,9 +1,12 @@
 package org.onosproject.incubator.net.resource.label;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.store.StoreDelegate;
+
 /**
  * Label resource store delegate.
  */
+@Beta
 public interface LabelResourceDelegate extends StoreDelegate<LabelResourceEvent> {
 
 }