[BVS-498] Uplink port prefixes can be specified in bigfloodlight.properties.  This prefixes will be used for classifying a port as an uplink port, thus autoportfast will not be used on those ports.

- Simple interfaces and a syslog implementation for notification.
- Post notification for switch disconnect, link add, link update or link rmeove.

Remove source and destination port status from LinkInfo data strucuture.  The source/destination port info is also removed in model and CLI.

1. making the API more RESTful by replacing dashes with slashes and maintaining URI tree
2. adding REST calls for listing events and resetting events
3. completing the REST API for GET calls

  1. Moving debug event for switch connect/disconnect to Controller (from LinkDiscovery) to be consistent with Shudong's changes
  2. Bug fix in OFChannelHandler that was causing NPE
  3. Bug fix in DebugEvents that was ignoring flushNow directive in event registry
  4. Updated unit test

* Make all fields final or volatile
* Still not 100% safe (visibility): lastSeenTimestamp of the entities
  can be changed unsynchronized

Includes framework for creating events and managing memory for events via
thread local stores and global circular buffers per registered event.
Also includes a basic rest api call to retrieve event history.
Unit tests have been added

* make sure we do things in the right order (setting role, sending role reqs)
* fix getName() in HAListener's
* transition AddressSpaceManager before DeviceManager to Master
* flush counters from threads
* add trace logging and more counters

moved json property declaration to variable decalartion

also remove custom serializers for switch, port variables