Test that list_volumes includes both attached and unattached devices
Test that list_volumes includes both attached and unattached devices

moypray/flocker,adamtheturtle/flocker,1d4Nf6/flocker,AndyHuu/flocker,jml/flocker,lukemarsden/flocker,wallnerryan/flocker-profiles,adamtheturtle/flocker,agonzalezro/flocker,AndyHuu/flocker,adamtheturtle/flocker,achanda/flocker,moypray/flocker,1d4Nf6/flocker,LaynePeng/flocker,hackday-profilers/flocker,Azulinho/flocker,mbrukman/flocker,moypray/flocker,LaynePeng/flocker,runcom/flocker,wallnerryan/flocker-profiles,jml/flocker,1d4Nf6/flocker,achanda/flocker,Azulinho/flocker,lukemarsden/flocker,LaynePeng/flocker,runcom/flocker,achanda/flocker,mbrukman/flocker,agonzalezro/flocker,hackday-profilers/flocker,lukemarsden/flocker,w4ngyi/flocker,runcom/flocker,w4ngyi/flocker,jml/flocker,Azulinho/flocker,wallnerryan/flocker-profiles,agonzalezro/flocker,w4ngyi/flocker,mbrukman/flocker,hackday-profilers/flocker,AndyHuu/flocker