create_region_with_id miss the schema validation

[Dave Chen]

When I am debugging the code for the fixing of bug #1468597, #1466872 [1], I found some testcases failure, they are `test_create_region_with_duplicate_id`, `test_create_region_with_matching_ids` and `test_create_region_with_id`.

After digging into the code, I found when the region is created with id provided is not given schema validation at all, this is beasue region reference data is not passed as dict, see [2], but validator expect the reference data is in kwargs [3] which is common usage when the resource is request with restful API.

So, the region creation with id given missed the schema validation.

[1] https://review.openstack.org/#/c/195903/
[2] https://github.com/openstack/keystone/blob/master/keystone/catalog/controllers.py#L173
[3] https://github.com/openstack/keystone/blob/master/keystone/common/validation/__init__.py#L34-L35

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/201007

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/209114

[OpenStack Infra (hudson-openstack)]

Change abandoned by Dave Chen (<email address hidden>) on branch: master
Review: https://review.openstack.org/201007
Reason: @Dolph, Henry, David, thanks for the review.
I am cool with the the alternative (https://review.openstack.org/#/c/209114/), let's do that instead.

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/209114
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=9ea5283f37d48b2df1d36b969e59ec69cb4974f7
Submitter: Jenkins
Branch: master

commit 9ea5283f37d48b2df1d36b969e59ec69cb4974f7
Author: David Stanek <email address hidden>
Date: Tue Aug 4 14:49:27 2015 +0000

    Hardens the validated decorator's implementation

    Previously the validated decorator expected to find the entities it
    validated in the kwargs. Since the method signatures require the
    argument I don't see any reason to force kwarg usage. This change will
    now also be able to find the argument in args.

    If the validated decorator was used with an incorrect resource to
    validate (a misspelling, etc.), then the validated call would never
    actually validate anything. This change will ensure, at import time,
    that the correct resource to validate is specified.

    Change-Id: Iad5f63cd34e4b75e64a1e233a0915d971a40f79a
    Closes-Bug: #1473848