tests: configure neutron external interface for ML2 CI runs
tests: configure neutron external interface for ML2 CI runs

edtubillara/ursula,mjbrewer/ursula,sivakom/ursula,allomov/ursula,kennjason/ursula,fancyhe/ursula,davidcusatis/ursula,panxia6679/ursula,msambol/ursula,persistent-ursula/ursula,lihkin213/ursula,twaldrop/ursula,j2sol/ursula,knandya/ursula,ryshah/ursula,zrs233/ursula,MaheshIBM/ursula,ddaskal/ursula,j2sol/ursula,ryshah/ursula,EricCrosson/ursula,twaldrop/ursula,edtubillara/ursula,kennjason/ursula,blueboxgroup/ursula,pgraziano/ursula,dlundquist/ursula,pbannister/ursula,ddaskal/ursula,narengan/ursula,lihkin213/ursula,lihkin213/ursula,rongzhus/ursula,masteinhauser/ursula,greghaynes/ursula,davidcusatis/ursula,rongzhus/ursula,andrewrothstein/ursula,pbannister/ursula,channus/ursula,twaldrop/ursula,nirajdp76/ursula,msambol/ursula,narengan/ursula,panxia6679/ursula,blueboxgroup/ursula,persistent-ursula/ursula,narengan/ursula,mjbrewer/ursula,paulczar/ursula,mjbrewer/ursula,twaldrop/ursula,knandya/ursula,greghaynes/ursula,sivakom/ursula,ryshah/ursula,ryshah/ursula,edtubillara/ursula,dlundquist/ursula,edtubillara/ursula,EricCrosson/ursula,zrs233/ursula,kennjason/ursula,masteinhauser/ursula,knandya/ursula,panxia6679/ursula,blueboxgroup/ursula,allomov/ursula,MaheshIBM/ursula,jwaibel/ursula,andrewrothstein/ursula,rongzhus/ursula,wupeiran/ursula,jwaibel/ursula,aldevigi/ursula,masteinhauser/ursula,panxia6679/ursula,dlundquist/ursula,wupeiran/ursula,andrewrothstein/ursula,nirajdp76/ursula,masteinhauser/ursula,paulczar/ursula,pgraziano/ursula,persistent-ursula/ursula,jwaibel/ursula,pgraziano/ursula,channus/ursula,sivakom/ursula,paulczar/ursula,j2sol/ursula,wupeiran/ursula,aldevigi/ursula,pgraziano/ursula,rongzhus/ursula,fancyhe/ursula,ddaskal/ursula,MaheshIBM/ursula,allomov/ursula,persistent-ursula/ursula,zrs233/ursula,aldevigi/ursula,zrs233/ursula,channus/ursula,greghaynes/ursula,fancyhe/ursula,msambol/ursula,channus/ursula,lihkin213/ursula,nirajdp76/ursula,j2sol/ursula,nirajdp76/ursula,narengan/ursula,davidcusatis/ursula,pbannister/ursula,EricCrosson/ursula,knandya/ursula,blueboxgroup/ursula,ddaskal/ursula,fancyhe/ursula,wupeiran/ursula