Add tests for workload.BuildPredicatesFor.
Add tests for workload.BuildPredicatesFor.

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