[ONOS-6551] Tunnel implementation for L3VPN service.

Change-Id: I3171a83305cb7391d80fda94ddf567629a10675e
diff --git a/models/huawei/src/main/yang/ne-l3vpn-api.yang b/models/huawei/src/main/yang/ne-l3vpn-api.yang
index 5b0181c..5320617 100644
--- a/models/huawei/src/main/yang/ne-l3vpn-api.yang
+++ b/models/huawei/src/main/yang/ne-l3vpn-api.yang
@@ -57,6 +57,9 @@
                                         type "string";
                                         description "route-distinguisher.";
                                     }
+                                    leaf tnlPolicyName {
+                                        type "string";
+                                    }
                                     container vpnTargets {
                                         description "";
                                         list vpnTarget {