fix bugs with unit assigned by making it a singular worker
fix bugs with unit assigned by making it a singular worker

axw/juju,reedobrien/juju,bogdanteleaga/juju,alesstimec/juju,bac/juju,waigani/juju,gabriel-samfira/juju,macgreagoir/juju,marcmolla/juju,kat-co/juju,mikemccracken/juju,davecheney/juju,mikemccracken/juju,waigani/juju,bz2/juju,ericsnowcurrently/juju,bogdanteleaga/juju,fwereade/juju,ericsnowcurrently/juju,frankban/juju,frankban/juju,anastasiamac/juju,davecheney/juju,frankban/juju,bogdanteleaga/juju,bac/juju,marcmolla/juju,mikemccracken/juju,gabriel-samfira/juju,kat-co/juju,voidspace/juju,mikemccracken/juju,marcmolla/juju,mjs/juju,dooferlad/juju,wwitzel3/juju,waigani/juju,anastasiamac/juju,perrito666/juju,bac/juju,dimitern/juju,axw/juju,davecheney/juju,fwereade/juju,howbazaar/juju,bz2/juju,gabriel-samfira/juju,macgreagoir/juju,dimitern/juju,voidspace/juju,axw/juju,waigani/juju,makyo/juju,marcmolla/juju,gabriel-samfira/juju,fwereade/juju,ericsnowcurrently/juju,dooferlad/juju,bz2/juju,dooferlad/juju,dooferlad/juju,dimitern/juju,mjs/juju,alesstimec/juju,alesstimec/juju,fwereade/juju,mikemccracken/juju,AdamIsrael/juju,perrito666/juju,wwitzel3/juju,AdamIsrael/juju,reedobrien/juju,mjs/juju,anastasiamac/juju,bz2/juju,alesstimec/juju,howbazaar/juju,frankban/juju,perrito666/juju,perrito666/juju,axw/juju,anastasiamac/juju,bac/juju,kat-co/juju,ericsnowcurrently/juju,mjs/juju,AdamIsrael/juju,perrito666/juju,ericsnowcurrently/juju,reedobrien/juju,dimitern/juju,kat-co/juju,makyo/juju,wwitzel3/juju,mjs/juju,anastasiamac/juju,dimitern/juju,reedobrien/juju,makyo/juju,howbazaar/juju,macgreagoir/juju,bac/juju,reedobrien/juju,gabriel-samfira/juju,macgreagoir/juju,bogdanteleaga/juju,davecheney/juju,frankban/juju,axw/juju,voidspace/juju,bz2/juju,mjs/juju,mjs/juju,marcmolla/juju,AdamIsrael/juju,voidspace/juju,howbazaar/juju,macgreagoir/juju,kat-co/juju,howbazaar/juju,wwitzel3/juju,alesstimec/juju,dooferlad/juju,makyo/juju