topology: fixing list composition bug
topology: fixing list composition bug

User may modify topology.entities after calling getEntitiesOfType(). This
throws a "Changed size during iteration" exception.

--HG--
extra : transplant_source : %D3moO%1BF%FA%3A%29%FB%C5C%D3%9B%CC%24%E6%D5%C2S

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