Parse label from PmsiTunnel for ingress and assisted replication

When parsing EVPN Type 3 routes the label is populated only if the
PmsiTunnel type is IngressReplication.  This causes problems when
handling Type 3 routes corresponding to Tor-Agent since these use
a different tunnel type.

Change-Id: Icb8fd36a511483bbaef278f35da3dd45dbcf5e56
Closes-Bug: 1451699

src/bgp/evpn/evpn_route.cc

@@ -170,7 +170,9 @@ int EvpnPrefix::FromProtoPrefix(BgpServer *server,
         prefix->ReadIpAddress(proto_prefix, ip_offset, ip_size);
         const PmsiTunnel *pmsi_tunnel = attr ? attr->pmsi_tunnel() : NULL;
         if (pmsi_tunnel &&
-            pmsi_tunnel->tunnel_type == PmsiTunnelSpec::IngressReplication) {
+            (pmsi_tunnel->tunnel_type == PmsiTunnelSpec::IngressReplication ||
+             pmsi_tunnel->tunnel_type ==
+             PmsiTunnelSpec::AssistedReplicationContrail)) {
             *label = pmsi_tunnel->label;
         }
         break;