change switches in site to be list, sorted them according to the dpid, set the first element to be True
change switches in site to be list, sorted them according to the dpid, set the first element to be True

timhuanggithub/MyPOX,timhuanggithub/MyPOX,timhuanggithub/MyPOX,timhuanggithub/MyPOX,timhuanggithub/MyPOX