Can not create a new image with the same ID of an already deleted one

Issue

• glance image-create specifying ID returns 409 Conflict: An image with identifier $UUID already exists (HTTP 409).
• Instance with an deleted image id does not start.

• An accidentally deleted image cannot be restored, causing instances with ephemeral based on it not to boot.

  2016-10-04 16:31:59.326 4020 ERROR oslo_messaging.rpc.dispatcher [req-e3451c32-1a2c-4d03-8c28-74cfc7593ac3 b898d2d4bbd14552bd05efa6538cbf13 ddf408fec8f94c589369ac69a196508f - - -] Exception during message handling: Image 57426954-d1a0-439a-b5ee-00e09ef07683 could not be found.
  <snip: TRACEBACK>
  2016-10-04 16:31:59.326 4020 TRACE oslo_messaging.rpc.dispatcher ImageNotFound: Image 57426954-d1a0-439a-b5ee-00e09ef07683 could not be found.