worker/diskmanager: fix import grouping
worker/diskmanager: fix import grouping

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