test_encrypted_cinder_volumes_luks fails with "Volume is still attached, detach volume first."

http://logs.openstack.org/43/154143/4/gate/gate-tempest-dsvm-full/45e8fbe/console.html#_2015-02-14_00_13_11_744

2015-02-14 00:13:11.743 | traceback-1: {{{
2015-02-14 00:13:11.743 | Traceback (most recent call last):
2015-02-14 00:13:11.743 | File "tempest/scenario/manager.py", line 113, in delete_wrapper
2015-02-14 00:13:11.743 | delete_thing(*args, **kwargs)
2015-02-14 00:13:11.743 | File "tempest/services/volume/json/volumes_client.py", line 105, in delete_volume
2015-02-14 00:13:11.743 | resp, body = self.delete("volumes/%s" % str(volume_id))
2015-02-14 00:13:11.743 | File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 175, in delete
2015-02-14 00:13:11.744 | return self.request('DELETE', url, extra_headers, headers, body)
2015-02-14 00:13:11.744 | File "tempest/common/service_client.py", line 63, in request
2015-02-14 00:13:11.744 | raise exceptions.BadRequest(ex)
2015-02-14 00:13:11.744 | BadRequest: Bad request
2015-02-14 00:13:11.744 | Details: Bad request
2015-02-14 00:13:11.744 | Details: {u'code': 400, u'message': u'Volume 10ee9e35-8820-414d-ad06-5b145fc7c03f is still attached, detach volume first.'}
2015-02-14 00:13:11.744 | }}}
2015-02-14 00:13:11.744 |
2015-02-14 00:13:11.744 | traceback-2: {{{
2015-02-14 00:13:11.744 | Traceback (most recent call last):
2015-02-14 00:13:11.744 | File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 521, in wait_for_resource_deletion
2015-02-14 00:13:11.744 | raise exceptions.TimeoutException(message)
2015-02-14 00:13:11.745 | TimeoutException: Request timed out
2015-02-14 00:13:11.745 | Details: (TestEncryptedCinderVolumes:_run_cleanups) Failed to delete volume 10ee9e35-8820-414d-ad06-5b145fc7c03f within the required time (196 s).
2015-02-14 00:13:11.745 | }}}
2015-02-14 00:13:11.745 |
2015-02-14 00:13:11.745 | traceback-3: {{{
2015-02-14 00:13:11.745 | Traceback (most recent call last):
2015-02-14 00:13:11.745 | File "tempest/services/volume/json/admin/volume_types_client.py", line 92, in delete_volume_type
2015-02-14 00:13:11.745 | resp, body = self.delete("types/%s" % str(volume_id))
2015-02-14 00:13:11.745 | File "/opt/stack/new/tempest/.tox/full/local/lib/python2.7/site-packages/tempest_lib/common/rest_client.py", line 175, in delete
2015-02-14 00:13:11.745 | return self.request('DELETE', url, extra_headers, headers, body)
2015-02-14 00:13:11.745 | File "tempest/common/service_client.py", line 63, in request
2015-02-14 00:13:11.745 | raise exceptions.BadRequest(ex)
2015-02-14 00:13:11.746 | BadRequest: Bad request
2015-02-14 00:13:11.746 | Details: Bad request
2015-02-14 00:13:11.746 | Details: {u'code': 400, u'message': u'Target volume type is still in use.'}
2015-02-14 00:13:11.746 | }}}
2015-02-14 00:13:11.746 |
2015-02-14 00:13:11.746 | Traceback (most recent call last):
2015-02-14 00:13:11.746 | File "tempest/test.py", line 109, in wrapper
2015-02-14 00:13:11.746 | return f(self, *func_args, **func_kwargs)
2015-02-14 00:13:11.746 | File "tempest/scenario/test_encrypted_cinder_volumes.py", line 56, in test_encrypted_cinder_volumes_luks
2015-02-14 00:13:11.746 | self.attach_detach_volume()
2015-02-14 00:13:11.746 | File "tempest/scenario/test_encrypted_cinder_volumes.py", line 49, in attach_detach_volume
2015-02-14 00:13:11.747 | self.nova_volume_detach()
2015-02-14 00:13:11.747 | File "tempest/scenario/manager.py", line 430, in nova_volume_detach
2015-02-14 00:13:11.747 | 'available')
2015-02-14 00:13:11.747 | File "tempest/services/volume/json/volumes_client.py", line 182, in wait_for_volume_status
2015-02-14 00:13:11.747 | raise exceptions.TimeoutException(message)
2015-02-14 00:13:11.747 | TimeoutException: Request timed out
2015-02-14 00:13:11.747 | Details: Volume 10ee9e35-8820-414d-ad06-5b145fc7c03f failed to reach available status (current: detaching) within the required time (196 s).