Save exceptions earlier in finish_resize
Save exceptions earlier in finish_resize

Fixes bug 1071595

When catching exceptions, _quota_rollback is called before we save an
exception for re-raising later.  Also: we should ignore any possible
exceptions from _quota_rollback so we are sure to set instance to error.

Change-Id: I50cb4879f7dcc13f99fa23a45030b4140dfc326a

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