Adding @Beta to TunnelService and associated API classes

Change-Id: I58ea6b5ef63ed9a6f7c45a3f27ed08fc70683acd
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelId.java b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelId.java
index 0cbad8c..5a3f97f 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelId.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/tunnel/TunnelId.java
@@ -16,10 +16,12 @@
 
 package org.onosproject.incubator.net.tunnel;
 
+import com.google.common.annotations.Beta;
 
 /**
  * Representation of a Tunnel Id.
  */
+@Beta
 public final class TunnelId {
     private final long value;