parameterize vm size, improve metadata, conditional for ubuntu version
parameterize vm size, improve metadata, conditional for ubuntu version

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