l2_multi: Cosmetic tweak
l2_multi: Cosmetic tweak

A field wasn't initialized in __init__.  It was never
accessed before being initialized, so this wasn't really
a problem, but I do like to set up everything in
__init__ if possible.

--HG--
extra : rebase_source : 45d2ec130c4d5b923dc3be16635fd187c9e5df8c

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