placement-api-ref: wrong parameter order

[Takashi Natsume]

Nova API reference guideline(*1) says:

------------------------------------------
3. Order the fields as follows
    1. header
    2. path
    3. query
    4. body
        1. top level object (i.e. server)
        2. required fields
        3. optional fields
        4. fields added in microversions (by the microversion they were added)
------------------------------------------

Optional fields should be after required fields.
But request bodies of the following APIs do not follows the guideline.
They are reference for placement API, but it should be fixed for consistency.

- PUT /resource_providers/{uuid}/inventories
- PUT /resource_providers/{uuid}/inventories/{resource_class}

*1: https://wiki.openstack.org/wiki/NovaAPIRef

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/516233

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/516233
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=0965e7ae6e17c4413571792c7e3a13e8f11400d6
Submitter: Zuul
Branch: master

commit 0965e7ae6e17c4413571792c7e3a13e8f11400d6
Author: Takashi NATSUME <email address hidden>
Date: Mon Oct 30 18:42:47 2017 +0900

    [placement] Fix parameter order in placement API ref

    Optional parameters should be after required paramenters.
    Parameters added in microversions should be after
    original parameters.
    So fix them.

    Change-Id: I5e3f5df5601d3747debed273e09a8b9b18046a96
    Closes-Bug: #1728557

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 17.0.0.0b2 development milestone.