of_json: Allow totally unparsed packets
of_json: Allow totally unparsed packets

This used to raise an exception

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