Comment 9 for bug 1262153

Similar variant:

Traceback (most recent call last):
  File "tempest/services/compute/json/servers_client.py", line 245, in rebuild
    return self.action(server_id, 'rebuild', 'server', **kwargs)
  File "tempest/services/compute/json/servers_client.py", line 203, in action
    post_body)
  File "tempest/common/rest_client.py", line 201, in post
    return self.request('POST', url, headers, body)
  File "tempest/common/rest_client.py", line 443, in request
    resp, resp_body)
  File "tempest/common/rest_client.py", line 497, in _error_checker
    raise exceptions.Conflict(resp_body)
Conflict: An object with that identifier already exists
Details: {u'message': u"Cannot 'rebuild' while instance is in task_state powering-off", u'code': 409}