Add a test for InstanceId.
Add a test for InstanceId.

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