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/LabelResource.java b/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResource.java
index 36d3111..bb1b316 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResource.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/resource/label/LabelResource.java
@@ -1,5 +1,6 @@
 package org.onosproject.incubator.net.resource.label;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.net.Annotated;
 import org.onosproject.net.DeviceId;
 import org.onosproject.net.NetworkResource;
@@ -8,6 +9,7 @@
 /**
  * Representation of label resource.
  */
+@Beta
 public interface LabelResource extends Annotated, Provided, NetworkResource {
     /**
      * Returns device id.