cmd/juju-metadata: generate-tools always resolves metadata
cmd/juju-metadata: generate-tools always resolves metadata

Always resolve size/sha256 from tools when generating
metadata. This removes the --fetch opton from the subcommand.

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