[v2] Duplicate image id return 500 instead of 409

[Feilong Wang]

Duplicate image id will return HTTP 500 error instead of 409 in Glance V2 API, see https://review.openstack.org/#/c/119285/1,publish

[Feilong Wang (flwang)]

After investigation, I think there are two bugs about this. The first one is we're using **id** in image schema but using **image_id** in new_image and most of the functions. It will cause a key error since the id can't recognized. I will open another bug to track this. The second bug is the image id duplicate exception is not catched in https://github.com/openstack/glance/blob/master/glance/api/v2/images.py#L59

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/119613

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/119613
Committed: https://git.openstack.org/cgit/openstack/glance/commit/?id=62ae4650b7a14e8f8cac95733d7bf190f034a317
Submitter: Jenkins
Branch: master

commit 62ae4650b7a14e8f8cac95733d7bf190f034a317
Author: Fei Long Wang <email address hidden>
Date: Tue Sep 9 11:29:50 2014 +1200

    Duplicated image id return 409 instead of 500 in API v2

    Based on current code, in API v2 duplicated image id will
    return HTTP 500 error instead of 409. This patch fix this
    issue and add an unit test case for that.

    Closes-Bug: 1366503

    Change-Id: Ia6c27f9edffd63619d63013e456072d811daf127