Adding @Beta to TunnelService and associated API classes

Change-Id: I58ea6b5ef63ed9a6f7c45a3f27ed08fc70683acd
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStoreDelegate.java b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStoreDelegate.java
index cf8a998..dfbc6ec 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStoreDelegate.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelStoreDelegate.java
@@ -16,10 +16,12 @@
 
 package org.onosproject.incubator.net.tunnel;
 
+import com.google.common.annotations.Beta;
 import org.onosproject.store.StoreDelegate;
 
 /**
  * Tunnel store delegate abstraction.
  */
+@Beta
 public interface TunnelStoreDelegate extends StoreDelegate<TunnelEvent> {
 }