provider/ec2: Extra logging around subnets selection
provider/ec2: Extra logging around subnets selection

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