keystone command should handle name arguments.

[Ken'ichi Ohmichi]

Hi, this is a wishlist rather than a bug.

Now a user should specify ID as tenant, user and role by keystone command,
and I feel it is better that a user can specify name of them.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/19899

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/19899
Committed: http://github.com/openstack/python-keystoneclient/commit/935166506277d3ee60eabdec5b0129f70c446ee5
Submitter: Jenkins
Branch: master

commit 935166506277d3ee60eabdec5b0129f70c446ee5
Author: Ken'ichi Ohmichi <email address hidden>
Date: Thu Jan 17 18:11:27 2013 +0900

    Add name arguments to keystone command.

    This patch adds name arguments to the following subcommands:
      * role-delete
      * role-get
      * service-delete
      * service-get
      * tenant-delete
      * tenant-get
      * tenant-update
      * user-delete
      * user-get
      * user-password-update
      * user-role-add
      * user-role-list
      * user-role-remove
      * user-update

    Fixes bug 1100648

    Change-Id: I73c08c0ba553a72ec57ff3a684a00be4ef1294a6