501 Not Implemented response missing "title" attribute

[Dolph Mathews]

501 responses from keystone are missing the error message title attribute, useful for GUI's. In addition, the HTTP status code returned by keystone appears as "501 None" instead of "501 Not Implemented".

Notice the error title attribute appears as "null" in the JSON response:

    $ curl -H 'X-Auth-Token: ADMIN' http://localhost:35357/v2.0/endpoints
    {"error": {"message": "The action you have requested has not been implemented.", "code": 501, "title": null}}

XML response appears similarly:

    $ curl -H 'X-Auth-Token: ADMIN' -H 'Accept: application/xml' http://localhost:35357/v2.0/endpoints
    <?xml version="1.0" encoding="UTF-8"?>
    <error xmlns="http://docs.openstack.org/identity/api/v2.0" message="The action you have requested has not been implemented." code="501"/>

And the headers returned by keystone appears as "HTTP/1.1 501 None":

    $ curl -H 'X-Auth-Token: ADMIN' http://localhost:35357/v2.0/endpoints -v
    [...]
    < HTTP/1.1 501 None
    < Content-Type: application/json
    < Vary: X-Auth-Token
    < Content-Length: 109
    < Date: Mon, 30 Apr 2012 12:56:47 GMT
    [...]

The client does not utilize this attribute (AFAIK), so it's not reproducible there:

    $ keystone --token=ADMIN --endpoint=http://localhost:35357/v2.0 endpoint-list
    The action you have requested has not been implemented. (HTTP 501)

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/6924

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/6924
Committed: http://github.com/openstack/keystone/commit/330d4af34f190517b3e40c9abf451dc1bc992fe3
Submitter: Jenkins
Branch: master

commit 330d4af34f190517b3e40c9abf451dc1bc992fe3
Author: Dolph Mathews <email address hidden>
Date: Mon Apr 30 08:05:28 2012 -0500

    Misnamed exception attribute (bug 991936)

    - exception.NotImplemented 'action' should have been 'title'
    - Automated test coverage of exceptions to catch this in the future

    Change-Id: I238e6bc8426ae009f570f0a04d2ea28501ae23fc