161e2807a9
Exercises use nova volume-* commands still. This works fine, however moving forward now that cinder is the default volume service we should use the cinderclient explicitly for the applicable calls. Attach/Detach are still novaclient commands, however the others (create, delete, list, etc) should be cinderclient. Change-Id: I336de1b69a32eee6c91655b0a5bf8541b243f2f0