Updated openstack/openstack
Project: openstack/glance  82fe844643aab9d50e33ab460391338232fe8bd4

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