Rechedule discovery task only if role is MASTER.  Also, start the scheduling when role is changed to master.

Send port status update from link discovery manager whenever a port status MODIFY message is received. Minor changes to printing of link discovery updates and addition of some trace logs.

Updates to attachment point learning and udpating.  DeviceManager listens to topologyChanged() events.  Whenever a port goes down or a switch is removed, attachment points are updated.  Cleanup of link discovery manager updates; cleanup also includes port up/down switch update/removed messages.

Rewrite of attachment point logic.  Attachmetn points are maintained independent of entities.  Update test cases.  Duplicate Mac test is disabled for the time being.

Update to link discovery manager.  LLDPs are sent every one second; with a three second timeout on ports where links were already found.  On ports where links are not present, LLDPs are sent once in every 15 seconds.

Bug fix: handleLLDP() method uses incorrect port variable when getting the state of the packet-in port.

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.

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.

Clean up serialization for REST APIs.  Get rid of the jackson converter module and just use annotations everywhere when appropriate.  There may still be a desire for something like the jackson converter module but it didn't really mesh with the plugin system, and the annotations work nicely.

Controller now needs to listen for storage notifcation and it will
dispatch updates if the controller node IPs change.

We now have three different types of updates in the Controller.updates
queue ==> Refactored to use different update classes that implement a
common IUpdate interface instead of a several types and a switch
statemet.

Add unit test for Controller.updates queue

Retab that caused some unrelated chagnes but now now more tabs:
    flconext, addInfoProvider, removeInfoProviderm getControllerInfo

Retab also causes changes in flcontext: that's only indentation.

Needed to touch quite some files to refactoring: rename
IHARoleListener -> IHAListener

[#29035681]

2 - Update module HA role change actions
3 - Add unit tests for HA role changes

Cleanup of topology manager to match floodlight style.  Remove StackTraceUtil.  Add packet-in listener to topology