openflow.nicira: Fix _eq in nx_reg_load
openflow.nicira: Fix _eq in nx_reg_load

This was doing a bad job for checking equality of
nx_reg_load actions.

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