Some 'nova' subcommands can not be specified by name

Fix proposed to branch: master
Review: https://review.openstack.org/18340

Reviewed: https://review.openstack.org/18340
Committed: http://github.com/openstack/python-novaclient/commit/eaf3c366c34c64f2e0a6ce0ada2b2db7ff09fc5b
Submitter: Jenkins
Branch: master

commit eaf3c366c34c64f2e0a6ce0ada2b2db7ff09fc5b
Author: Ken'ichi Ohmichi <email address hidden>
Date: Wed Dec 19 04:23:36 2012 +0900

    Specify some arguments by name.

    'nova boot', 'nova flavor-key', 'nova flavor-show' and the other subcommands
    can be specified by a flavor name also.
    But 'nova flavor-delete' and 'nova list --flavor' cannot, also 'nova list
    --image' cannot be specified by a image name.
    I feel it is user-friendly that a user can specify arguments by name.

    By this patch, a user can do it like the following.

    Before appying this patch:
     $ nova flavor-delete m1.tiny
     ERROR: Flavor m1.tiny could not be found. (HTTP 404) (Request-ID: req-af2c049f-1b77-42cf-a9ed-a3914626bc83)
     $
     $ nova list --flavor m1.tiny
     ERROR: Flavor could not be found (HTTP 422) (Request-ID: req-dbfd5df2-77d7-4a71-a3e6-b1f7fd25b96c)
     $
     $ nova list --image cirros-0.3.0-x86_64-uec

     $

    After appying this patch:
     $ nova flavor-delete m1.tiny
     $
     $ nova list --flavor m1.tiny
     +--------------------------------------+--------+--------+------------------+
     | ID | Name | Status | Networks |
     +--------------------------------------+--------+--------+------------------+
     | 2f003e0e-bfdf-4f56-bdf9-276732e640a0 | test01 | ACTIVE | private=10.0.0.2 |
     +--------------------------------------+--------+--------+------------------+
     $
     $ nova list --image cirros-0.3.0-x86_64-uec
     +--------------------------------------+--------+--------+------------------+
     | ID | Name | Status | Networks |
     +--------------------------------------+--------+--------+------------------+
     | 2f003e0e-bfdf-4f56-bdf9-276732e640a0 | test01 | ACTIVE | private=10.0.0.2 |
     +--------------------------------------+--------+--------+------------------+
     $

    Fixes bug 1091814

    Change-Id: Ic7f6ce76608a448dea3c151bc349391fbf3fa456