Fix bug #1218256: Upgrade the worker/upgrader to call DesiredVersion.
Fix bug #1218256: Upgrade the worker/upgrader to call DesiredVersion.

This now makes it so we don't spin bouncing the Upgrader agent while
waiting for first connect from the User.

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