Identity API spec for creating domain-config should be PUT not POST

[Henry Nash]

The API for creating a domain specific config incorrectly shows

POST /domains/{domain_id}/config

instead of

PUT /domains/{domain_id}/config

...which is what the code does, since the /config part of the API is not valid until the config is create.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/159919

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/159919
Committed: https://git.openstack.org/cgit/openstack/keystone-specs/commit/?id=a76c14732f4612986107ff54fd3f09303d8e567b
Submitter: Jenkins
Branch: master

commit a76c14732f4612986107ff54fd3f09303d8e567b
Author: Henry Nash <email address hidden>
Date: Fri Feb 27 16:41:49 2015 +0000

    Correct the use of POST for domain configs

    The API spec hints that you should use POST to create domain
    specific configs for a domain, whereas in fact you should use
    PUT, since the URL isn't technically valid until after you
    have created the config.

    Change-Id: Id17e642c95c1a627a4036f057d5761f25ed853c1
    Closes-bug: 1426448