CLI "nova keypair-show", Positional arguments description error

[Xiaowei Qian]

CLI "nova keypair-show <Name or ID>", Positional arguments description supports ID , but does not actually support, So we need to modify the help information.

Reproduction:
[root]# nova help keypair-show
usage: nova keypair-show <keypair>

Show details about the given keypair.

Positional arguments:
  <keypair> Name or ID of keypair

[root]# nova keypair-show key-2
+-------------+-------------------------------------------------+
| Property | Value |
+-------------+-------------------------------------------------+
| created_at | 2015-09-01T02:38:15.000000 |
| deleted | False |
| deleted_at | - |
| fingerprint | b0:72:9e:89:03:aa:75:27:bc:98:12:9e:78:46:98:be |
| id | 631 |
| name | key-2 |
| updated_at | - |
| user_id | f20b321c214c46f897f33764e791722e |
+-------------+-------------------------------------------------+

[root]# nova keypair-show 631
ERROR (CommandError): No keypair with a name or ID of '631' exists.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/221170

[OpenStack Infra (hudson-openstack)]

Change abandoned by Xiaowei Qian (<email address hidden>) on branch: master
Review: https://review.openstack.org/221170
Reason: error

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/221181

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/221181
Committed: https://git.openstack.org/cgit/openstack/python-novaclient/commit/?id=f636481f015c380b610eb8c7e67571a3b4807c55
Submitter: Jenkins
Branch: master

commit f636481f015c380b610eb8c7e67571a3b4807c55
Author: Xiaowei Qian <email address hidden>
Date: Tue Sep 8 08:01:56 2015 +0000

    Modify "nova keypair-show" Positional arguments help information

    CLI "nova keypair-show <keypair>", Positional arguments:
      <keypair> Name or ID of keypair
    But in fact, it does not support ID,when using ID, the error is as follows:
    [root]# nova keypair-show 631
    ERROR (CommandError): No keypair with a name or ID of '631' exists.
    So it is needed to change the Positional arguments help information
    from "Name or ID of keypair" to "Name of keypair".

    Change-Id: I4cd022a6aa1ca937e7aeb33847dc3ce2d6d5690e
    Closes-Bug: #1493212
    Signed-off-by: Xiaowei Qian <email address hidden>