state: allow testWatcher to be used by different Backings
state: allow testWatcher to be used by different Backings

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