v3 endpoint create should require url

[wanghong]

When create a endpoint, if I do not specify "service_id" I will get the following reponse:
curl -i -H "X-Auth-Token:admin" -H "Content-Type:application/json" http://127.0.0.1:35357/v3/endpoints -d '{"endpoint":{"interface":"test"}}'

{"error": {"message": "service_id field is required and cannot be empty", "code": 400, "title": "Bad Request"}}openstack@openstack-HP-Compaq-8100-Elite-CMT-PC:~/devstack$

But, if I do not specify "url" I will get another reponse as following:
curl -i -H "X-Auth-Token:admin" -H "Content-Type:application/json" http://127.0.0.1:35357/v3/endpoints -d '{"endpoint":{"interface":"test","service_id":"d893b85ae4f842d5bb1727e271cf5be3"}}'

{"error": {"message": "An unexpected error prevented the server from fulfilling your request. (OperationalError) (1048, \"Column 'url' cannot be null\") 'INSERT INTO endpoint (id, legacy_endpoint_id, interface, region, service_id, url, extra) VALUES (%s, %s, %s, %s, %s, %s, %s)' ('57b1f66ed22f45c3ba43812d7eabac69', None, 'test', None, 'd893b85ae4f842d5bb1727e271cf5be3', None, '{}')", "code": 500, "title": "Internal Server Error"}}

The url parameter should be required too.

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/76409

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/76409
Committed: https://git.openstack.org/cgit/openstack/keystone/commit/?id=aabf0b525edc2e5063bdba72a33ea6db919423b6
Submitter: Jenkins
Branch: master

commit aabf0b525edc2e5063bdba72a33ea6db919423b6
Author: wanghong <email address hidden>
Date: Wed Feb 26 09:21:14 2014 +0800

    v3 endpoint create should require url

    The url parameter of endpoint object is not nullable in db, but we
    do not have a null check in api. So, when create a endpoint if I
    do not specify url parameter I will get a 500 reponse.
    This patch will add an attribute require check to url parameter.

    Change-Id: I9c8aa3bcb99ea5cb5e4e4d3306d8d222c6f074d1
    Closes-Bug: #1284422