* Fixed couple of bugs in Device.getIPv4Addresses().
* Add more debugging output to DeviceManagerImpl

* implement findDestDeviveByEntity()
* findDevice() and findDestDevice() will now throw an exception of the
  supplied fields are not sufficient for the lookup
* test and comment polishing
* reorganizing testing code

[BSC-1838]

(These icons were designed from scratch by me with ASL 2.0 license.)
Nodes are now labeled with their name (DPID or IP+MAC).
Added a hack to ignore multiple attachment points for hosts, since
Floodlight's concept of attachment points doesn't correspond to the
physical topology.

and associated javadocs

[BSC-1838]

* IEntityClassifier only returns a single entity class per entity and all
  entities of a device must belong to the same entity class. Semantics for
  multiple classes was unclear.

* IEntityClassifier is now an IFloodlightService to have a cleaner way of
  setting the classifier to use (the classifier needs to be set before
  DeviceManager.startUp() is called).

[BSC-1838]

2 - Fix some tabbing.

getRoute() method must provide the complete route from source port to destination port even when the route involves only one switch.  getRoute() must also not provide route from same switch-port to itself.

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.