'module' object has no attribute 'id_to_ec2_id'

Using bzr828:

When using the EC2 API I get the following exception when trying to delete a server that doesn't exist:

root@nova1:~# euca-terminate-instances i-00000005
Warning: failed to parse error message from AWS: <unknown>:1:0: syntax error
BotoServerError: 500 Internal Server Error
Traceback (most recent call last):
  File "/usr/lib/pymodules/python2.6/eventlet/wsgi.py", line 336, in handle_one_response
    result = self.application(self.environ, start_response)
  File "/usr/lib/pymodules/python2.6/paste/urlmap.py", line 203, in __call__
    return app(environ, start_response)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 147, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 208, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/pymodules/python2.6/nova/api/ec2/__init__.py", line 59, in __call__
    rv = req.get_response(self.application)
  File "/usr/lib/pymodules/python2.6/webob/request.py", line 919, in get_response
    application, catch_exc_info=False)
  File "/usr/lib/pymodules/python2.6/webob/request.py", line 887, in call_application
    app_iter = application(self.environ, start_response)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 159, in __call__
    return resp(environ, start_response)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 159, in __call__
    return resp(environ, start_response)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 159, in __call__
    return resp(environ, start_response)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 147, in __call__
    resp = self.call_func(req, *args, **self.kwargs)
  File "/usr/lib/pymodules/python2.6/webob/dec.py", line 208, in call_func
    return self.func(req, *args, **kwargs)
  File "/usr/lib/pymodules/python2.6/nova/api/ec2/__init__.py", line 322, in __call__
    ec2_id = cloud.id_to_ec2_id(ex.instance_id)
AttributeError: 'module' object has no attribute 'id_to_ec2_id'

---

The attached patch resolves the issue.