Fix GetBundleChanges API tests for new bundlechanges library.
Fix GetBundleChanges API tests for new bundlechanges library.

marcmolla/juju,gabriel-samfira/juju,mikemccracken/juju,mjs/juju,bac/juju,macgreagoir/juju,reedobrien/juju,dimitern/juju,dimitern/juju,howbazaar/juju,macgreagoir/juju,frankban/juju,howbazaar/juju,frankban/juju,alesstimec/juju,dimitern/juju,waigani/juju,howbazaar/juju,macgreagoir/juju,bz2/juju,gabriel-samfira/juju,perrito666/juju,mikemccracken/juju,reedobrien/juju,marcmolla/juju,AdamIsrael/juju,ericsnowcurrently/juju,alesstimec/juju,ericsnowcurrently/juju,bac/juju,gabriel-samfira/juju,axw/juju,mjs/juju,waigani/juju,mikemccracken/juju,alesstimec/juju,bac/juju,AdamIsrael/juju,gabriel-samfira/juju,mjs/juju,marcmolla/juju,anastasiamac/juju,frankban/juju,AdamIsrael/juju,axw/juju,kat-co/juju,kat-co/juju,ericsnowcurrently/juju,howbazaar/juju,bz2/juju,axw/juju,mjs/juju,perrito666/juju,macgreagoir/juju,bz2/juju,frankban/juju,reedobrien/juju,perrito666/juju,anastasiamac/juju,mikemccracken/juju,axw/juju,frankban/juju,alesstimec/juju,dimitern/juju,reedobrien/juju,bac/juju,marcmolla/juju,anastasiamac/juju,waigani/juju,ericsnowcurrently/juju,alesstimec/juju,dimitern/juju,kat-co/juju,bac/juju,perrito666/juju,anastasiamac/juju,mjs/juju,mikemccracken/juju,macgreagoir/juju,gabriel-samfira/juju,reedobrien/juju,ericsnowcurrently/juju,axw/juju,marcmolla/juju,AdamIsrael/juju,bz2/juju,bz2/juju,howbazaar/juju,waigani/juju,mjs/juju,kat-co/juju,kat-co/juju,mjs/juju,perrito666/juju,anastasiamac/juju