state/multiwatcher: removed invalid and misleading bson tags
state/multiwatcher: removed invalid and misleading bson tags

A number of the entity info structs had bson struct tags. This doesn't
make sense because these structs are never marshalled to BSON (JSON
only). To make things worse, the field names in the tags didn't match
the actual field name used over the API, creating unnecessary
confusion.

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