Comment 3 for bug 1495002

The only difference in logs between "normal" vif add/delete and "orphan" vif add/delete is the SANDESH Queue Drop message:

/var/log/contrail/contrail-control.log:2015-12-17 Thu 17:13:18:091.419 CET l3.contrail.semihalf.com [Thread 140644162922240, Pid 4501]: SANDESH: Queue Drop: IFMap [SYS_DEBUG]: IFMapClientSendInfo: Sent Update of link <virtual-machine-interface-routing-instance:attr(default-domain:admin:f62dc606-2609-46d4-a92c-00ee0b602edc,default-domain:admin:net:net),routing-instance:default-domain:admin:net:net> to vRouter default-global-system-config:l3.contrail.semihalf.com l3.contrail.semihalf.com:172.16.0.1 controller/src/ifmap/ifmap_update_sender.cc 318