Update novaclient shell to use shared arguments from Session

The novaclient implemented it's own version of the CLI arguments that
are now provided by keystoneclient's session object. This changeset
converts nova over to utilizing the shared argument registration.

Change-Id: Ifc9ddc08614e28358229db84cb9b54552ca36d51
Co-Authored-By: David Hu <david.hu@hp.com>
Merge "Update novaclient shell to use shared arguments from Session"