prepare to implement dijkstra
may work?
cast work , no flow create
broadcast work
non-zero dpid for devicemanager
use dijkstra
log change
Merge remote-tracking branch 'origin/master' into merge1

Conflicts:
	src/jp/co/nttdata/ofc/nosap/sample/VirtualL2Service/logical/LogicalSwitch.java
add log to dijkstra
no set src mac in lldp