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Based on the OpenStack documentation at http://docs.openstack.org/api
/openstack-compute/2/content/ChangesSince.html..."To allow clients to
keep track of changes, the changes-since filter displays items that have
been recently deleted. Both images and servers contain a DELETED status
that indicates that the resource has been removed."  This allows
OpenStack consumers to determine when images and servers are deleted
when using the changes-since support.  OpenStack works as documented for
images.  However, changes-since support in OpenStack Havana may not
return deleted servers with a DELETED status.

The recreate scenario is as follows:
1) Boot a new server and wait for the boot to complete.
2) Save the current time 
3) Use changes-since to get all servers changed since the time saved in step 2.  It should be none.
4) Delete the server created in step 1 and wait for the delete to complete.
5) Use changes-since to get all servers changed since the time saved in step 2.  It should include the server deleted in step 4 and the server's status should be DELETED.  The actual result is that the server is included but its status is ERROR.

For the above recreate scenario, the boot failed because no valid host
was found.  As a result, the server is in ERROR status after step 1.  I
have not tested with a successful boot.

** Affects: nova
     Importance: Undecided
         Status: New

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Changes-since not returning deleted servers
https://bugs.launchpad.net/bugs/1243301
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