tempest-dsvm-neutron-heat-slow fails with StackBuildErrorException (security group already exists))

A StackBuildErrorException is raised because the security groups is already existing:

http://logs.openstack.org/89/76489/5/check/check-tempest-dsvm-neutron-heat-slow/032beb0/console.html

 2014-04-05 08:18:05.239 | ======================================================================
 2014-04-05 08:18:05.240 | FAIL: tempest.api.orchestration.stacks.test_server_cfn_init.ServerCfnInitTestJSON.test_can_log_into_created_server[slow]
 2014-04-05 08:18:05.240 | tempest.api.orchestration.stacks.test_server_cfn_init.ServerCfnInitTestJSON.test_can_log_into_created_server[slow]
 2014-04-05 08:18:05.240 | ----------------------------------------------------------------------
 2014-04-05 08:18:05.240 | _StringException: Empty attachments:
 2014-04-05 08:18:05.240 | stderr
 2014-04-05 08:18:05.240 | stdout
 2014-04-05 08:18:05.240 |
 2014-04-05 08:18:05.240 | pythonlogging:'': {{{
     2014-04-05 08:18:05.240 | 2014-04-05 08:13:19,183 Request (ServerCfnInitTestJSON:test_can_log_into_created_server): 200 GET http://162.242.239.53:8004/v1/db647826b32c490cbdea807a84f41ba4/stacks/heat-217555013/04ed822c-d2f2-4984-9579-c6bf468941b2 0.042s
     2014-04-05 08:18:05.240 | 2014-04-05 08:13:20,235 Request (ServerCfnInitTestJSON:test_can_log_into_created_server): 200 GET http://162.242.239.53:8004/v1/db647826b32c490cbdea807a84f41ba4/stacks/heat-217555013/04ed822c-d2f2-4984-9579-c6bf468941b2 0.049s
     2014-04-05 08:18:05.240 | }}}
     2014-04-05 08:18:05.240 |
     2014-04-05 08:18:05.241 | Traceback (most recent call last):
     2014-04-05 08:18:05.241 | File "tempest/api/orchestration/stacks/test_server_cfn_init.py", line 64, in test_can_log_into_created_server
     2014-04-05 08:18:05.241 | self.client.wait_for_stack_status(sid, 'CREATE_COMPLETE')
     2014-04-05 08:18:05.241 | File "tempest/services/orchestration/json/orchestration_client.py", line 185, in wait_for_stack_status
     2014-04-05 08:18:05.241 | stack_status_reason=body['stack_status_reason'])
     2014-04-05 08:18:05.241 | StackBuildErrorException: Stack heat-217555013/04ed822c-d2f2-4984-9579-c6bf468941b2 is in CREATE_FAILED status due to 'Resource CREATE failed: BadRequest: Security group default already exists for project db647826b32c490cbdea807a84f41ba4. (HTTP 400) (Request-ID: req-23737d4c-85d4-4dff-b6fd-ed0382128c9e)'