Libvirt updates for image_ref.
Libvirt updates for image_ref.

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