create/update of v3 servers return 422 when input is invalid

[Alex Xu]

In v3 servers core api, create and update will return 422 when input is invalid.

if not self.is_valid_body(body, 'server'):
            raise exc.HTTPUnprocessableEntity()

We prefer use 400 for this case in v3 api.

[Matt Riedemann (mriedem)]

It's the same way in the v2 API. There are other APIs doing the same thing too. Maybe a discussion for nova on the dev mailing list?

[Christopher Yeoh (cyeoh-0)]

We have been fixing this in the V2 API for a while as well because 422 is a WebDav error code. I unfortunately can not find the original discussion around this.

[Mark McLoughlin (markmc)]

Review is here: https://review.openstack.org/56532

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/56532
Committed: http://github.com/openstack/nova/commit/3cdc0799fd0ab22bc4a83df8157adbbc72bcfa53
Submitter: Jenkins
Branch: master

commit 3cdc0799fd0ab22bc4a83df8157adbbc72bcfa53
Author: He Jie Xu <email address hidden>
Date: Fri Nov 15 13:52:51 2013 +0800

    Use 400 instead of 422 for invalid input in v3 servers core

    We return 400 when input is invalid for v3 api. This patch fix
    this case for servers core.

    DocImpact

    Change-Id: If802d4dcba6ed25f7e9cb9d568a3ffd78f0f6c68
    Closes-Bug: 1251538