Add functionality to define requests without body

[OpenStack Infra]

https://review.openstack.org/207150
Dear bug triager. This bug was created since a commit was marked with DOCIMPACT.

commit 9b430f99518e10ae263bedec3062408af332068c
Author: Niall Bunting <email address hidden>
Date: Tue Jul 28 15:05:10 2015 +0000

    Add functionality to define requests without body

    This allows functions that do not accept bodies to define this in the
    router file. As currently many requests will cause a 500 if a body is
    supplied when the API request does not expect it.

    This currently only affects the core parts of the v2 api, that is,
    calls to v2/images and v2/schemas. It does not cover the "tasks" API
    or the metadefs api as I was keeping this patch concise. As this
    does not affect the behaviour if not included this makes no change to
    the metadefs api behaviour.

    DocImpact

    Partial-Bug: 1475647

    Change-Id: Ieb510e5516128078d40d39fd9b4f339ce64e10e7

[Atsushi SAKAI (sakaia)]

For API-site, this change affects error response code(400).

see
https://review.openstack.org/#/c/207150/13/glance/tests/functional/v2/test_images.py

[Atsushi SAKAI (sakaia)]

In my opinion, It does not need to describe the documents (i.e. openstack-manuals).

[Alexandra Settle (alexandra-settle)]

Agreed that this is not a bug in manuals.

[Brian Rosmaita (brian-rosmaita)]

This has been fixed in the current api-ref, which is located in the Glance code repository.