Revert "Fix local variable 'root_uuid' ref before assign"
Revert "Fix local variable 'root_uuid' ref before assign"

This reverts commit 30bc1ef250f0230a9a1f562cd51b0f57d4a35912, which
fixed a NameError but introduced a new bug in the deploy process
that could cause silent failures in a deploy. Instead, we should
log a more descriptive error and allow the exception to be raised.

Change-Id: I0221984ce4f7c406990315ef820d9ce63fc6e015

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