Directly create bootable volume based on image ID.
Directly create bootable volume based on image ID.

Now that a bootable volume can be created directly based on
image ID, we can dispense with the complexity around using
a builder instance to acheive the same effect.

Change-Id: Ied1f6863a4dd21685e2f135841b9e2c4d499675f

samgoon/devstack,openstack-dev/devstack,TwinkleChawla/devstack,dtroyer/devstack,LoHChina/devstack,nawawi/openstack,mmasaki/devstack,neerja28/Devstack_GlusterFS,parul24/devstack,varunarya10/devstack,ozamiatin/devstack,prithivm/branch01,group-policy/devstack,CloudServer/devstack,liuquansheng47/devstack,dirkmueller/devstack,sequenceiq/devstack,richliu/devstack,williamthegrey/devstack,noironetworks/devstack,cloudbuilders/devstack,rushiagr/devstack,olivierlemasle/devstack,NaokiMiyata/devstack,thomasem/devstack,BSJAIN92/OpenStack,vishnugonela/devstack,sc68cal/devstack,Yuriy-Leonov/devstack,pacinete/devstack,prithivm/branch01,LoHChina/devstack,ykaneko/devstack,liuquansheng47/devstack,affo/devstack,nuxeh/devstack,andrewrothstein/devstack,openstack-dev/devstack,CiscoSystems/devstack,HPCHub/devstack,pczerkas/devstack,herrsechs/devstack,ykaneko/devstack,dirkmueller/devstack,varunarya10/devstack,mc2014/devstack,avvocatodemarchis/devstack,nuxeh/devstack,nawawi/openstack,deepakselvaraj/devstack,citrix-openstack-build/devstack,pacinete/devstack,Juniper/devstack,bq-xiao/devstack,tianweizhang/devstack,parul24/devstack,pombredanne/devstack,avvocatodemarchis/devstack,rushiagr/devstack,andrewrothstein/devstack,mssumanth/devstack,citrix-openstack-build/devstack,eharney/devstack,inkerra/devstack,flavio-fernandes/devstack,vsham20/devstack,Mahito/devstack,promptworks/devstack,tianweizhang/devstack,BSJAIN92/OpenStack,innodee/openstackk,herrsechs/devstack,Millnert/contrail-devstack,JioCloud/devstack,CloudServer/devstack,promptworks/devstack,HPCHub/devstack,armando-migliaccio/devstack,atulpatil301/devstack,costingalan/devstack,bigswitch/devstack,richliu/devstack,flavio-fernandes/devstack,kplus/devstack-moonshot,atulpatil301/devstack,kplus/devstack-moonshot,upadhyay-prashant/devstack,ewindisch/raspi-devstack,Mahito/devstack,shootstar/devstacktest,bigswitch/devstack,pczerkas/devstack,jamielennox/devstack,wenhuizhang/devstack,eharney/devstack,ewindisch/raspi-devstack,wenhuizhang/devstack,costingalan/devstack,bljgaurav/openstack-test,eshnil2000/devstack,j4/devstack,NaokiMiyata/devstack,sc68cal/devstack,sstrato/devstack,olivierlemasle/devstack,cloudbuilders/devstack,affo/devstack,j4/devstack,neerja28/Devstack_GlusterFS,vsham20/devstack,bq-xiao/devstack,mc2014/devstack,thomasem/devstack,dtroyer/devstack,mmasaki/devstack,pombredanne/devstack,bswartz/devstack,TwinkleChawla/devstack,group-policy/devstack,bswartz/devstack,virtualopensystems/devstack,sequenceiq/devstack,samgoon/devstack,upadhyay-prashant/devstack,yamt/devstack,bljgaurav/openstack-test,mssumanth/devstack,ozamiatin/devstack,srics/devstack,vishnugonela/devstack,noironetworks/devstack