500 error with duplicate key pairs

[Nachi Ueno]

500 error with duplicate key pairs
This must be 400 Bad Request.

URI：https://servers.api.openstack.com/v1.1/{tenantId}/os-keypairs
Method：POST
API：/v1.1/{tenantId}/os-keypairs

Parameter:

keyname=test38116997634 <- This name is already registered.

Responsce.

resp={'date': 'Thu, 01 Dec 2011 02:52:16 GMT', 'status': '500', 'content-length': '133', 'content-type': 'application/json; charset=UTF-8'}
body={"cloudServersFault": {"message": "The server has either erred or is incapable of performing the requested operation.", "code": 500}}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/3699

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/3699
Committed: http://github.com/openstack/nova/commit/999db21e1a5a0944535e0fb0fd2478ab1647d85b
Submitter: Jenkins
Branch: master

commit 999db21e1a5a0944535e0fb0fd2478ab1647d85b
Author: Nirmal Ranganathan <email address hidden>
Date: Thu Feb 2 14:19:57 2012 -0600

    Throw an user error on creating duplicate keypairs
    Fixes bug 902162

    Change-Id: I1b73943aab338bde90b4d47bc015964e9981af5d