Document releases APIs were deprecated in

Change-Id: I240ce9155fd6aee0200350e1b04d13ebfb89b3c1
diff --git a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java
index e04d0ee..1a1c423 100644
--- a/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java
+++ b/protocols/ovsdb/api/src/main/java/org/onosproject/ovsdb/controller/OvsdbClientService.java
@@ -48,6 +48,7 @@
      *
      * @param srcIp source IP address
      * @param dstIp destination IP address
+     * @deprecated 1.4.0 Emu release
      */
     @Deprecated
     void createTunnel(IpAddress srcIp, IpAddress dstIp);