Ignore errors when deleting the default route in the ensure_bridge function.
Ignore errors when deleting the default route in the ensure_bridge function.

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