Catch illformated event-history count cases.

speed up staticflowpusher unittests (https://github.com/floodlight/floodlight/pull/25)

was 50s to run, now 2s

added Unittest
code submitted from  roberto.doriguzzi@create-net.org
    Thanks!

log msg cleanup (https://github.com/floodlight/floodlight/pull/24)

Adding isTruncated field to the IPv4. It is set to true of the totalLength doesn't match the byte[] length during deserialization.

remove a log msg, show packetIn in packetIn toString()src/main/java/net/floodlightcontroller/core/internal/Controller.java

Add a command line option to change the number of threads. (https://github.com/floodlight/floodlight/pull/22)

Event-history for topology related events: switch connects/disconnects, links ups/downs, cluster merge/splits.

Move switch locking code from IOFSwitch interface to OFSwitchImpl. (https://github.com/floodlight/floodlight/pull/21)

Works since only Controller needs to lock.

On switch connect send LLDPs only from that switch. (https://github.com/floodlight/floodlight/pull/19)

Still had problems when switches with same DPID connect. Should be fixed now. (https://github.com/floodlight/floodlight/pull/20)

After a switch is asynchronously removed due to another switch with the
same DPID connecting, the first switch might still have messages qeued.
If we process these messages after removing the switch switch listeners
can get confused.

[#23382219]

Added *.class