provider/gce: Preserve the disk info across the addInstance call.
provider/gce: Preserve the disk info across the addInstance call.

cloud-green/juju,bac/juju,howbazaar/juju,alesstimec/juju,fwereade/juju,cmars/juju,voidspace/juju,fwereade/juju,ericsnowcurrently/juju,AdamIsrael/juju,tych0/juju,anastasiamac/juju,tych0/juju,macgreagoir/juju,marcmolla/juju,thomnico/juju,bz2/juju,davecheney/juju,frankban/juju-tmp,mjs/juju,reedobrien/juju,AdamIsrael/juju,tsakas/juju,perrito666/juju,frankban/juju-tmp,mikemccracken/juju,davecheney/juju,waigani/juju,alesstimec/juju,mikemccracken/juju,voidspace/juju,frankban/juju-tmp,axw/juju,wwitzel3/juju,bogdanteleaga/juju,alesstimec/juju,wwitzel3/juju,cherylj/juju,perrito666/juju,cmars/juju,dimitern/juju,cmars/juju,davecheney/juju,bac/juju,wwitzel3/juju,dimitern/juju,bz2/juju,kat-co/juju,Altoros/juju-cloudsigma,dooferlad/juju,howbazaar/juju,tasdomas/juju,frankban/juju-tmp,bogdanteleaga/juju,makyo/juju,reedobrien/juju,tasdomas/juju,anastasiamac/juju,dimitern/juju,mikemccracken/juju,mhilton/juju-juju,Altoros/juju-cloudsigma,thomnico/juju,kat-co/juju,frankban/juju,mjs/juju,makyo/juju,cherylj/juju,makyo/juju,mhilton/juju-juju,kat-co/juju,sinzui/juju,sinzui/juju,tsakas/juju,cloud-green/juju,bac/juju,dooferlad/juju,voidspace/juju,perrito666/juju,mhilton/juju,tsakas/juju,davecheney/juju,perrito666/juju,mhilton/juju,tych0/juju,thomnico/juju,mhilton/juju,mjs/juju,ericsnowcurrently/juju,sinzui/juju,marcmolla/juju,frankban/juju,cherylj/juju,bz2/juju,fwereade/juju,mjs/juju,dimitern/juju,howbazaar/juju,makyo/juju,waigani/juju,macgreagoir/juju,tasdomas/juju,axw/juju,perrito666/juju,kat-co/juju,bogdanteleaga/juju,gabriel-samfira/juju,dooferlad/juju,cloud-green/juju,macgreagoir/juju,gabriel-samfira/juju,ericsnowcurrently/juju,AdamIsrael/juju,mhilton/juju,bac/juju,Altoros/juju-cloudsigma,waigani/juju,axw/juju,alesstimec/juju,cmars/juju,howbazaar/juju,dimitern/juju,wwitzel3/juju,dooferlad/juju,bogdanteleaga/juju,mikemccracken/juju,waigani/juju,thomnico/juju,gabriel-samfira/juju,mhilton/juju-juju,bz2/juju,fwereade/juju,gabriel-samfira/juju,reedobrien/juju,frankban/juju,bac/juju,tsakas/juju,mhilton/juju-juju,anastasiamac/juju,anastasiamac/juju,ericsnowcurrently/juju,marcmolla/juju,voidspace/juju,howbazaar/juju,macgreagoir/juju,frankban/juju,marcmolla/juju,mjs/juju,ericsnowcurrently/juju,bz2/juju,frankban/juju,cloud-green/juju,sinzui/juju,axw/juju,axw/juju,gabriel-samfira/juju,mjs/juju,cherylj/juju,kat-co/juju,marcmolla/juju,anastasiamac/juju,AdamIsrael/juju,dooferlad/juju,mikemccracken/juju,Altoros/juju-cloudsigma,mjs/juju,reedobrien/juju,tych0/juju,tasdomas/juju,reedobrien/juju,macgreagoir/juju,alesstimec/juju