Add and fix tests for attaching volumes.
Add and fix tests for attaching volumes.

Change-Id: I94ecd429266823369be6fd168256e9f3a1cd5287

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