Adding @Beta to TunnelService and associated API classes

Change-Id: I58ea6b5ef63ed9a6f7c45a3f27ed08fc70683acd
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStore.java b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStore.java
index b773611..00ed577 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStore.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStore.java
@@ -17,6 +17,7 @@
 
 import java.util.Collection;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.core.ApplicationId;
 import org.onosproject.incubator.net.tunnel.Tunnel.Type;
 import org.onosproject.net.Annotations;
@@ -26,6 +27,7 @@
 /**
  * Manages inventory of tunnel; not intended for direct use.
  */
+@Beta
 public interface TunnelStore extends Store<TunnelEvent, TunnelStoreDelegate> {
     /**
      * Creates or updates a tunnel.