libopenflow: Make BARRIER_REQUEST controller msg
libopenflow: Make BARRIER_REQUEST controller msg

BARRIER_REQUESTs come from the controller, but were previously
marked as being from switches.  Oops.

carlye566/IoT-POX,kulawczukmarcin/mypox,carlye566/IoT-POX,jacobq/csci5221-viro-project,MurphyMc/pox,pthien92/sdn,MurphyMc/pox,MurphyMc/pox,denovogroup/pox,pthien92/sdn,PrincetonUniversity/pox,xAKLx/pox,jacobq/csci5221-viro-project,kavitshah8/SDNDeveloper,kavitshah8/SDNDeveloper,andiwundsam/_of_normalize,pthien92/sdn,chenyuntc/pox,VamsikrishnaNallabothu/pox,diogommartins/pox,diogommartins/pox,kpengboy/pox-exercise,chenyuntc/pox,diogommartins/pox,kpengboy/pox-exercise,chenyuntc/pox,adusia/pox,PrincetonUniversity/pox,pthien92/sdn,MurphyMc/pox,xAKLx/pox,andiwundsam/_of_normalize,diogommartins/pox,waltznetworks/pox,xAKLx/pox,VamsikrishnaNallabothu/pox,jacobq/csci5221-viro-project,chenyuntc/pox,waltznetworks/pox,waltznetworks/pox,kpengboy/pox-exercise,PrincetonUniversity/pox,adusia/pox,kavitshah8/SDNDeveloper,kulawczukmarcin/mypox,noxrepo/pox,MurphyMc/pox,kpengboy/pox-exercise,carlye566/IoT-POX,adusia/pox,kulawczukmarcin/mypox,jacobq/csci5221-viro-project,denovogroup/pox,kulawczukmarcin/mypox,adusia/pox,xAKLx/pox,denovogroup/pox,carlye566/IoT-POX,adusia/pox,PrincetonUniversity/pox,VamsikrishnaNallabothu/pox,jacobq/csci5221-viro-project,kpengboy/pox-exercise,denovogroup/pox,carlye566/IoT-POX,noxrepo/pox,noxrepo/pox,andiwundsam/_of_normalize,noxrepo/pox,andiwundsam/_of_normalize,xAKLx/pox,VamsikrishnaNallabothu/pox,kulawczukmarcin/mypox,denovogroup/pox,pthien92/sdn,VamsikrishnaNallabothu/pox,waltznetworks/pox,diogommartins/pox,PrincetonUniversity/pox,waltznetworks/pox,kavitshah8/SDNDeveloper,chenyuntc/pox