ServerRescueTestJSON tearDownClass FAILs with "ComputeFault: Got compute fault"

[Thierry Carrez]

Looks familiar but couldn't find a dupe for that:
http://logs.openstack.org/84/50384/2/gate/gate-tempest-devstack-vm-neutron-pg-isolated/0600e23/console.html

2013-10-08 23:43:39.713 | tempest.thirdparty.boto.test_s3_objects.S3BucketsTest.test_create_get_delete_object[gate,smoke] ... ok
2013-10-08 23:43:39.719 | Error in atexit._run_exitfuncs:
2013-10-08 23:43:39.721 | Traceback (most recent call last):
2013-10-08 23:43:39.722 | File "/usr/lib/python2.7/atexit.py", line 24, in _run_exitfuncs
2013-10-08 23:43:39.750 | func(*targs, **kargs)
2013-10-08 23:43:39.750 | File "tempest/test.py", line 167, in validate_tearDownClass
2013-10-08 23:43:39.750 | + str(at_exit_set))
2013-10-08 23:43:39.750 | RuntimeError: tearDownClass does not calls the super's tearDownClass in these classes: set([<class 'tempest.api.compute.servers.test_server_rescue.ServerRescueTestJSON'>])
2013-10-08 23:43:39.751 | Error in sys.exitfunc:
2013-10-08 23:43:39.832 |
2013-10-08 23:43:39.832 | process-returncode
2013-10-08 23:43:39.832 | process-returncode ... FAIL
2013-10-08 23:43:40.069 |
2013-10-08 23:43:40.069 | ======================================================================
2013-10-08 23:43:40.069 | FAIL: tearDownClass (tempest.api.compute.servers.test_server_rescue.ServerRescueTestJSON)
2013-10-08 23:43:40.070 | tearDownClass (tempest.api.compute.servers.test_server_rescue.ServerRescueTestJSON)
2013-10-08 23:43:40.070 | ----------------------------------------------------------------------
2013-10-08 23:43:40.070 | _StringException: Traceback (most recent call last):
2013-10-08 23:43:40.070 | File "tempest/api/compute/servers/test_server_rescue.py", line 95, in tearDownClass
2013-10-08 23:43:40.070 | super(ServerRescueTestJSON, cls).tearDownClass()
2013-10-08 23:43:40.070 | File "tempest/api/compute/base.py", line 119, in tearDownClass
2013-10-08 23:43:40.070 | cls.isolated_creds.clear_isolated_creds()
2013-10-08 23:43:40.071 | File "tempest/common/isolated_creds.py", line 453, in clear_isolated_creds
2013-10-08 23:43:40.071 | self._clear_isolated_net_resources()
2013-10-08 23:43:40.071 | File "tempest/common/isolated_creds.py", line 445, in _clear_isolated_net_resources
2013-10-08 23:43:40.071 | self._clear_isolated_network(network['id'], network['name'])
2013-10-08 23:43:40.071 | File "tempest/common/isolated_creds.py", line 399, in _clear_isolated_network
2013-10-08 23:43:40.071 | net_client.delete_network(network_id)
2013-10-08 23:43:40.071 | File "tempest/services/network/json/network_client.py", line 76, in delete_network
2013-10-08 23:43:40.072 | resp, body = self.delete(uri, self.headers)
2013-10-08 23:43:40.072 | File "tempest/common/rest_client.py", line 308, in delete
2013-10-08 23:43:40.072 | return self.request('DELETE', url, headers)
2013-10-08 23:43:40.072 | File "tempest/common/rest_client.py", line 436, in request
2013-10-08 23:43:40.072 | resp, resp_body)
2013-10-08 23:43:40.072 | File "tempest/common/rest_client.py", line 522, in _error_checker
2013-10-08 23:43:40.073 | raise exceptions.ComputeFault(message)
2013-10-08 23:43:40.073 | ComputeFault: Got compute fault
2013-10-08 23:43:40.073 | Details: {"NeutronError": "Request Failed: internal server error while processing your request."}
2013-10-08 23:43:40.073 |