Refactoring Route class and getRoute() methods to maintain and provide a sequence of switch-ports, rather than links.  Update unit tests accordingly.

Link discovery manager must send LDUpdate when port status change message is received if it affects any links that is already known.

If a standard LLDP comes from a different network, we should drop it.  The standard LLDP mac address could be :00, :03, :0e.

Fixed missing paren in PythonServer

Display port name (ethN, brN, etc.) for OVS ports.
Cleaned up some more formatting.

2 - Fixed an issue in DeviceManagerImpl where it was sending updates with the old device.

(For some reason the switch list takes ~10s to load, and I'm running on
a monster server.)

Updated UI to match REST API changes.
Commented out references to VLANs since they're not implemented.
Fixed some more space/tab formatting.

Also fixed some tab/space formatting inconsistency.

Reverse the sequence of operations to do when a switch is added - first clear all flow mods and then dispatch switch added callbacks in dispatch thread. Else we have a race condition.

Updates to DeviceManagerImplTest corresponding to changes in attachment point computation using topology last changed time.

When sending LLDPs and BDDPs from all the switches, send LLDPs first and then BDDPs. This would enable direct links to be detected first and reduced instability.