Necessary step for switch sync. We can't use
IFloodlightProvider.getSwitches() anymore. We now have a getSwitch()
method. There are also methods to get all dpids (getAllSwitchDpids())
and to get a map (getAllSwitchesMap()). These two return a snapshot.
TODO: need to check if they are used under the correct assumption in
existing code.

First stab at SwitchSyncRepresentation, which is the object I indent to
put in the SyncStore.

Also fixed an issue in Static Flow Pusher that would leave an orphaned flow if a static flow changed it's DPID.

FLOODLIGHT-30 - When deleting all entries put in by the static flow pusher for a specific switch or all switches   use a single delete based on matching the static flow pusher cookie instead of deleting each   flow individually.   Note: this means that flows mods are no longer hashed to have unique cookies.

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

/wm/staticflowentrypusher/list/{switch}/json
{switch} can be 'all' or a DPID in Hex format, i.e. '00:00:00:00:00:00:00:01'

Make static flow pusher into a service (IStaticFlowEntryPusherService). This will allow other Floodlight modules to push static flows without using the REST API.

Re-write of the Static Flow Entry Pusher. This one uses memory storage notifications and supports more actions.

Fixed JUnit tests.

Conflicts:

	src/main/java/net/floodlightcontroller/util/TimedCache.java

2 - Added a call to change StaticFlowPusher push interval
3 - Added various comments

Conflicts:

	src/main/java/net/floodlightcontroller/topology/internal/TopologyImpl.java