clarify which release APIs were deprecated in

Change-Id: I1e036aaae500b0468b5b900031ebf6746da782f5
diff --git a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java
index 0f1936e..c38ce17 100644
--- a/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java
+++ b/incubator/api/src/main/java/org/onosproject/incubator/net/virtual/VirtualNetworkStore.java
@@ -239,6 +239,7 @@
      *
      * @param intent   intent
      * @param tunnelId tunnel identifier
+     * @deprecated in Kingfisher Release (1.10)
      */
     @Deprecated
     void addTunnelId(Intent intent, TunnelId tunnelId);
@@ -248,6 +249,7 @@
      *
      * @param intent intent
      * @return set of tunnel identifiers
+     * @deprecated in Kingfisher Release (1.10)
      */
     @Deprecated
     Set<TunnelId> getTunnelIds(Intent intent);
@@ -257,6 +259,7 @@
      *
      * @param intent   intent
      * @param tunnelId tunnel identifier
+     * @deprecated in Kingfisher Release (1.10)
      */
     @Deprecated
     void removeTunnelId(Intent intent, TunnelId tunnelId);