provider/ec2: wait for EBS volume to be created
provider/ec2: wait for EBS volume to be created

Wait for volume to be created before returning
from CreateVolumes. Fix virtualisation-type
comparison to be against "paravirtual" and not
"pv".

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