Create project with invalid domain_id

[Rodrigo Duarte]

Right now it is possible to create a project with an invalid domain_id (we do not check if the domain_id exists in the create_project method) if we are using engines that not support foreign keys, such as sqllite: https://github.com/openstack/keystone/blob/master/keystone/resource/core.py#L87-L116

If we are using engines that support foreign keys, the error returned is not really helpfull:

{
    "error": {
        "code": 500,
        "message": "An unexpected error occurred when trying to store project (Disable debug mode to suppress these details.)",
        "title": "Internal Server Error"
    }
}

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/159944

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/160446

[OpenStack Infra (hudson-openstack)]

Change abandoned by Rodrigo Duarte (<email address hidden>) on branch: master
Review: https://review.openstack.org/160446
Reason: abandoning since it is only valid for sqlite

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/159944
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=a0a2f637ee3ba58d64dd12d33303abbd454a5213
Submitter: Jenkins
Branch: master

commit a0a2f637ee3ba58d64dd12d33303abbd454a5213
Author: Rodrigo Duarte Sousa <email address hidden>
Date: Fri Feb 27 15:35:12 2015 -0300

    Add domain_id checking in create_project

    It was possible to create a project with invalid domain_id if
    we are using engines that do not support foreign keys (such
    as sqlite). If the engine being used supports foreign keys
    the returned error was a generic Internal Server Error.

    This patch adds a check in the create_project() method in
    order to verify if the domain_id is valid (there is a domain
    with such id), returning DomainNotFound error if it is case.

    Co-Authored-By: Hugo Nicodemos <email address hidden>
    Co-Authored-By: Raildo Mascena <email address hidden>
    Co-Authored-By: Erickson Santos <email address hidden>

    Change-Id: I8f394f46ab915844228de00c5a9223c1e3fb6be1
    Closes-Bug: 1426496