webob.exc.HTTPUnprocessableEntity can't return correct messages

[Haiwei Xu]

In nova/api/openstack/compute/contrib/services.py there are codes like:

190 if id == "disable-log-reason":
191 reason = body['disabled_reason']
192 if not self._is_valid_as_reason(reason):
193 msg = _('The string containing the reason for disabling '
194 'the service contains invalid characters or is '
195 'too long.')
196 raise webob.exc.HTTPUnprocessableEntity(detail=msg)

But HTTPUnprocessableEntity should use 'explanation' parameter to return the error message.

The source can be referred here:

https://github.com/Pylons/webob/blob/master/webob/exc.py#L885

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/75736

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/75736
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=7eb42f18ce8574b28ecba16b478bcfc40dfa2005
Submitter: Jenkins
Branch: master

commit 7eb42f18ce8574b28ecba16b478bcfc40dfa2005
Author: Haiwei Xu <email address hidden>
Date: Mon Feb 24 19:30:43 2014 +0900

    Change HTTPUnprocessableEntity to HTTPBadRequest

    Change HTTPUnprocessableEntity to HTTPBadRequest, and use the
    parameter 'explanation' in place of'detail' to show the correct
    error message.
    This patch fixes this bug.

    Change-Id: I6dc2cbe29f24634138ba4c5255b0edd7b8ad6b0e
    Closes-Bug: #1283876