tests: Improve module_load_test
tests: Improve module_load_test

This makes two changes:
1) No longer tries to load things that are in a directory
   without an __init__.py
2) *Does* explicitly load packages (__init__.py)

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