Simplify libvirt volume testing code.
Simplify libvirt volume testing code.

There is no need to copy all of the iscsi generation from
provider_location because provider_location is an internal
implementation detail from cinder. We just need to make sure that
we handle values for iqn and target properly.

Change-Id: Ic80228ad22e58887a93d45168a6ad5f2f6c30e20

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