tests: avoid traceback warning in test_live_migration
tests: avoid traceback warning in test_live_migration

Change-Id: I959e780e88a31ad8105dc0d8bbb544c8c50f49e5

aristanetworks/arista-ovs-nova,j-carpentier/nova,berrange/nova,JianyuWang/nova,Stavitsky/nova,mikalstill/nova,zaina/nova,BeyondTheClouds/nova,jianghuaw/nova,Yusuke1987/openstack_template,akash1808/nova_test_latest,projectcalico/calico-nova,tangfeixiong/nova,rrader/nova-docker-plugin,cyx1231st/nova,CiscoSystems/nova,orbitfp7/nova,sridevikoushik31/nova,bgxavier/nova,virtualopensystems/nova,JioCloud/nova,tanglei528/nova,luogangyi/bcec-nova,devoid/nova,leilihh/nova,plumgrid/plumgrid-nova,petrutlucian94/nova_dev,Juniper/nova,yrobla/nova,NoBodyCam/TftpPxeBootBareMetal,saleemjaveds/https-github.com-openstack-nova,affo/nova,belmiromoreira/nova,TwinkleChawla/nova,affo/nova,whitepages/nova,CEG-FYP-OpenStack/scheduler,mandeepdhami/nova,yrobla/nova,projectcalico/calico-nova,Triv90/Nova,spring-week-topos/nova-week,maoy/zknova,citrix-openstack-build/nova,maoy/zknova,openstack/nova,dims/nova,kimjaejoong/nova,mahak/nova,akash1808/nova_test_latest,nikesh-mahalka/nova,ted-gould/nova,yatinkumbhare/openstack-nova,savi-dev/nova,watonyweng/nova,rajalokan/nova,usc-isi/nova,ntt-sic/nova,badock/nova,angdraug/nova,phenoxim/nova,nikesh-mahalka/nova,houshengbo/nova_vmware_compute_driver,CiscoSystems/nova,fajoy/nova,shahar-stratoscale/nova,devendermishrajio/nova_test_latest,rickerc/nova_audit,savi-dev/nova,gooddata/openstack-nova,yosshy/nova,Juniper/nova,usc-isi/nova,fnordahl/nova,CCI-MOC/nova,noironetworks/nova,jianghuaw/nova,rahulunair/nova,sebrandon1/nova,mmnelemane/nova,sridevikoushik31/nova,imsplitbit/nova,adelina-t/nova,cloudbase/nova,cloudbase/nova-virtualbox,rajalokan/nova,devendermishrajio/nova_test_latest,NeCTAR-RC/nova,luogangyi/bcec-nova,Triv90/Nova,yosshy/nova,cernops/nova,viggates/nova,hanlind/nova,mikalstill/nova,Tehsmash/nova,qwefi/nova,belmiromoreira/nova,tianweizhang/nova,maheshp/novatest,JioCloud/nova_test_latest,rickerc/nova_audit,gooddata/openstack-nova,Stavitsky/nova,klmitch/nova,jeffrey4l/nova,iuliat/nova,varunarya10/nova_test_latest,joker946/nova,zhimin711/nova,silenceli/nova,akash1808/nova,rajalokan/nova,isyippee/nova,blueboxgroup/nova,raildo/nova,Juniper/nova,cloudbau/nova,klmitch/nova,plumgrid/plumgrid-nova,sridevikoushik31/openstack,gooddata/openstack-nova,cloudbase/nova,openstack/nova,jianghuaw/nova,kimjaejoong/nova,houshengbo/nova_vmware_compute_driver,devoid/nova,ruslanloman/nova,dawnpower/nova,fajoy/nova,Yuriy-Leonov/nova,tealover/nova,OpenAcademy-OpenStack/nova-scheduler,fajoy/nova,aristanetworks/arista-ovs-nova,eonpatapon/nova,takeshineshiro/nova,double12gzh/nova,Yuriy-Leonov/nova,DirectXMan12/nova-hacking,JioCloud/nova,NoBodyCam/TftpPxeBootBareMetal,TwinkleChawla/nova,gspilio/nova,akash1808/nova,virtualopensystems/nova,bgxavier/nova,whitepages/nova,berrange/nova,LoHChina/nova,zzicewind/nova,CloudServer/nova,NewpTone/stacklab-nova,devendermishrajio/nova,usc-isi/nova,joker946/nova,barnsnake351/nova,LoHChina/nova,MountainWei/nova,maelnor/nova,angdraug/nova,yrobla/nova,eharney/nova,sacharya/nova,apporc/nova,eayunstack/nova,alvarolopez/nova,sridevikoushik31/nova,varunarya10/nova_test_latest,BeyondTheClouds/nova,dstroppa/openstack-smartos-nova-grizzly,CloudServer/nova,Metaswitch/calico-nova,mmnelemane/nova,paulmathews/nova,vmturbo/nova,leilihh/novaha,jeffrey4l/nova,adelina-t/nova,Brocade-OpenSource/OpenStack-DNRM-Nova,bclau/nova,tangfeixiong/nova,vmturbo/nova,gooddata/openstack-nova,hanlind/nova,JioCloud/nova_test_latest,eayunstack/nova,sacharya/nova,Triv90/Nova,spring-week-topos/nova-week,NewpTone/stacklab-nova,rahulunair/nova,cloudbase/nova-virtualbox,Juniper/nova,maheshp/novatest,yatinkumbhare/openstack-nova,mandeepdhami/nova,ntt-sic/nova,double12gzh/nova,sridevikoushik31/nova,phenoxim/nova,tanglei528/nova,scripnichenko/nova,edulramirez/nova,leilihh/novaha,openstack/nova,dawnpower/nova,Metaswitch/calico-nova,savi-dev/nova,shail2810/nova,bigswitch/nova,iuliat/nova,vladikr/nova_drafts,sebrandon1/nova,alaski/nova,petrutlucian94/nova_dev,jianghuaw/nova,watonyweng/nova,mikalstill/nova,viggates/nova,imsplitbit/nova,DirectXMan12/nova-hacking,edulramirez/nova,NeCTAR-RC/nova,raildo/nova,petrutlucian94/nova,mgagne/nova,badock/nova,felixma/nova,cloudbau/nova,ewindisch/nova,tealover/nova,leilihh/nova,DirectXMan12/nova-hacking,MountainWei/nova,vladikr/nova_drafts,SUSE-Cloud/nova,ted-gould/nova,eonpatapon/nova,fnordahl/nova,redhat-openstack/nova,maoy/zknova,mahak/nova,hanlind/nova,redhat-openstack/nova,rajalokan/nova,vmturbo/nova,TieWei/nova,citrix-openstack-build/nova,shootstar/novatest,zaina/nova,bigswitch/nova,scripnichenko/nova,alaski/nova,OpenAcademy-OpenStack/nova-scheduler,mahak/nova,thomasem/nova,CCI-MOC/nova,eharney/nova,tianweizhang/nova,Francis-Liu/animated-broccoli,zhimin711/nova,sridevikoushik31/openstack,thomasem/nova,noironetworks/nova,aristanetworks/arista-ovs-nova,maelnor/nova,houshengbo/nova_vmware_compute_driver,ewindisch/nova,paulmathews/nova,Yusuke1987/openstack_template,dims/nova,saleemjaveds/https-github.com-openstack-nova,NoBodyCam/TftpPxeBootBareMetal,Francis-Liu/animated-broccoli,JianyuWang/nova,shootstar/novatest,cloudbase/nova,petrutlucian94/nova,isyippee/nova,klmitch/nova,bclau/nova,silenceli/nova,rahulunair/nova,BeyondTheClouds/nova,SUSE-Cloud/nova,blueboxgroup/nova,barnsnake351/nova,qwefi/nova,alexandrucoman/vbox-nova-driver,cyx1231st/nova,shail2810/nova,apporc/nova,paulmathews/nova,TieWei/nova,Tehsmash/nova,tudorvio/nova,CEG-FYP-OpenStack/scheduler,devendermishrajio/nova,tudorvio/nova,orbitfp7/nova,gspilio/nova,dstroppa/openstack-smartos-nova-grizzly,zzicewind/nova,alexandrucoman/vbox-nova-driver,j-carpentier/nova,takeshineshiro/nova,vmturbo/nova,sebrandon1/nova,cernops/nova,dstroppa/openstack-smartos-nova-grizzly,klmitch/nova,maheshp/novatest,mgagne/nova,ruslanloman/nova,alvarolopez/nova,sridevikoushik31/openstack,Brocade-OpenSource/OpenStack-DNRM-Nova,felixma/nova,rrader/nova-docker-plugin,cernops/nova,shahar-stratoscale/nova,NewpTone/stacklab-nova,gspilio/nova