Fix error status code on update-volume APIliberty-eol12.0.6stable/liberty

As the following part of API-WG guidline[1],

  If a request contains a reference to a nonexistent resource in the
  body (not URI), the code should be 400 Bad Request. Do not use 404
  NotFound because :rfc:`7231#section-6.5.4` (section 6.5.4) mentions
  the origin server did not find a current representation for the
  target resource for 404 and representation for the target resource
  means a URI

Nova should return a BadRequest response(400) in this case, because
new_volume_id is specified in a request body. old_volume_id is not
necessary to be changed because the value is specified with URI.
So it is valid to return NotFound response if that is not existent.

[1]: https://github.com/openstack/api-wg/blob/master/guidelines/http.rst#failure-code-clarifications

Close-Bug: #1629110
Change-Id: Ib781b116f5af713d64b5880858cc4f81c3da3977
(cherry picked from commit edd86d9dac1ea75bc580a7964e7d699ee9644b19)
(cherry picked from commit 4e6958551c324635a8720fc9125e9596860637f7)

0 files changed, 0 insertions, 0 deletions