Update notes for submitted changes

* -Populate source and destination VN even for short flow whenever that information can be determined from routes. Currently flows which are marked as short because of absense of routes have Source and Destination VN as unknown. Added UT and updated test cases accordingly. -Also convert LOG to cout for cases where Logging is still not initialized. Change-Id: Ifcfc1f52171785c3b78b26756b53aca9d65264f0