Also fixed OVS local port display.

Updates to VNF.

Fixed inconsistent switch representations in log messages

Updates.

Updates Dijkstra's shortest path algorithm. (1) NodeDist will return the node with the smallest weight in the priority queue; (2) The algorithm will replace an existing entry in the priority queue.

This change is mostly for streamlining and clarifying IDeviceServiceAPI.
* renamed findDestDevice to findClassDevice
* pass an entityClass to findClassDevice instead of the
  "source"/"reference" device.

Merge into master from pull request #1820: Fix NPE (https://github.com/bigswitch/bigswitchcontroller/pull/1820)

Update subtree.

minor add to FirewallRulesResource

Conflicts:
	bigtest/staticflowpusher/StaticFlowTest1.py

Ok. Let's put the code back in since bigtest is updated now
BSC-2784

This reverts commit 92bfa7a1d71d930f530b8a9cac39c3e6a14a6479.

Cosmetic changes.  Rename varialbe name topology to linkDiscovery, and getTopology to getLinkDiscoveryManager in LinkDiscoveryManagerTest.java.

Merge into master from pull request #1725: Added logging for overload drop, updated parameters  (https://github.com/bigswitch/bigswitchcontroller/pull/1725)