TestMinimumBasicScenario.test_minimum_basic_scenario race fail comparing volume to expected values with updated_at diff

Seen here:

http://logs.openstack.org/51/643451/28/check/nova-next/17c3af7/job-output.txt.gz#_2019-07-27_01_20_36_245189

Looks like the test isn't filtering out updated_at from expected values but probably should to avoid race failures.

2019-07-27 01:20:36.245189 | controller | {1} tempest.scenario.test_minimum_basic.TestMinimumBasicScenario.test_minimum_basic_scenario [21.310866s] ... FAILED
2019-07-27 01:20:36.245278 | controller |
2019-07-27 01:20:36.245325 | controller | Captured traceback:
2019-07-27 01:20:36.245362 | controller | ~~~~~~~~~~~~~~~~~~~
2019-07-27 01:20:36.245428 | controller | b'Traceback (most recent call last):'
2019-07-27 01:20:36.245526 | controller | b' File "/opt/stack/tempest/tempest/common/utils/__init__.py", line 89, in wrapper'
2019-07-27 01:20:36.245611 | controller | b' return f(*func_args, **func_kwargs)'
2019-07-27 01:20:36.245740 | controller | b' File "/opt/stack/tempest/tempest/scenario/test_minimum_basic.py", line 118, in test_minimum_basic_scenario'
2019-07-27 01:20:36.245803 | controller | b' self.cinder_show(volume)'
2019-07-27 01:20:36.246358 | controller | b' File "/opt/stack/tempest/tempest/scenario/test_minimum_basic.py", line 64, in cinder_show'
2019-07-27 01:20:36.246456 | controller | b' self.assertEqual(volume, got_volume)'
2019-07-27 01:20:36.246605 | controller | b' File "/opt/stack/tempest/.tox/tempest/lib/python3.6/site-packages/testtools/testcase.py", line 411, in assertEqual'
2019-07-27 01:20:36.247445 | controller | b' self.assertThat(observed, matcher, message)'
2019-07-27 01:20:36.247601 | controller | b' File "/opt/stack/tempest/.tox/tempest/lib/python3.6/site-packages/testtools/testcase.py", line 498, in assertThat'
2019-07-27 01:20:36.247648 | controller | b' raise mismatch_error'
2019-07-27 01:20:36.247704 | controller | b'testtools.matchers._impl.MismatchError: !=:'
2019-07-27 01:20:36.247749 | controller | b"reference = {'attachments': [],"
2019-07-27 01:20:36.248037 | controller | b" 'availability_zone': 'nova',"
2019-07-27 01:20:36.248913 | controller | b" 'bootable': 'false',"
2019-07-27 01:20:36.249002 | controller | b" 'consistencygroup_id': None,"
2019-07-27 01:20:36.249079 | controller | b" 'created_at': '2019-07-27T01:20:28.000000',"
2019-07-27 01:20:36.249134 | controller | b" 'description': None,"
2019-07-27 01:20:36.249184 | controller | b" 'encrypted': False,"
2019-07-27 01:20:36.249275 | controller | b" 'id': '12d211dd-48b7-45d9-9154-75470931e85b',"
2019-07-27 01:20:36.249432 | controller | b" 'links': [{'href': 'https://149.202.184.221/volume/v3/862bd3e1e8b34dfda2413be1ed10ff10/volumes/12d211dd-48b7-45d9-9154-75470931e85b',"
2019-07-27 01:20:36.249510 | controller | b" 'rel': 'self'},"
2019-07-27 01:20:36.249659 | controller | b" {'href': 'https://149.202.184.221/volume/862bd3e1e8b34dfda2413be1ed10ff10/volumes/12d211dd-48b7-45d9-9154-75470931e85b',"
2019-07-27 01:20:36.249869 | controller | b" 'rel': 'bookmark'}],"
2019-07-27 01:20:36.249924 | controller | b" 'metadata': {},"
2019-07-27 01:20:36.249975 | controller | b" 'multiattach': False,"
2019-07-27 01:20:36.250087 | controller | b" 'name': 'tempest-TestMinimumBasicScenario-volume-1950148737',"
2019-07-27 01:20:36.250193 | controller | b" 'os-vol-tenant-attr:tenant_id': '862bd3e1e8b34dfda2413be1ed10ff10',"
2019-07-27 01:20:36.250253 | controller | b" 'replication_status': None,"
2019-07-27 01:20:36.251473 | controller | b" 'size': 1,"
2019-07-27 01:20:36.251540 | controller | b" 'snapshot_id': None,"
2019-07-27 01:20:36.251591 | controller | b" 'source_volid': None,"
2019-07-27 01:20:36.251643 | controller | b" 'status': 'available',"
2019-07-27 01:20:36.251717 | controller | b" 'updated_at': '2019-07-27T01:20:29.000000',"
2019-07-27 01:20:36.251798 | controller | b" 'user_id': '16e9467e3ed74b039c20d6103d69f9c5',"
2019-07-27 01:20:36.251851 | controller | b" 'volume_type': 'lvmdriver-1'}"
2019-07-27 01:20:36.251894 | controller | b"actual = {'attachments': [],"
2019-07-27 01:20:36.251928 | controller | b" 'availability_zone': 'nova',"
2019-07-27 01:20:36.251954 | controller | b" 'bootable': 'false',"
2019-07-27 01:20:36.251986 | controller | b" 'consistencygroup_id': None,"
2019-07-27 01:20:36.252026 | controller | b" 'created_at': '2019-07-27T01:20:28.000000',"
2019-07-27 01:20:36.252052 | controller | b" 'description': None,"
2019-07-27 01:20:36.252078 | controller | b" 'encrypted': False,"
2019-07-27 01:20:36.252119 | controller | b" 'id': '12d211dd-48b7-45d9-9154-75470931e85b',"
2019-07-27 01:20:36.252214 | controller | b" 'links': [{'href': 'https://149.202.184.221/volume/v3/862bd3e1e8b34dfda2413be1ed10ff10/volumes/12d211dd-48b7-45d9-9154-75470931e85b',"
2019-07-27 01:20:36.252250 | controller | b" 'rel': 'self'},"
2019-07-27 01:20:36.252352 | controller | b" {'href': 'https://149.202.184.221/volume/862bd3e1e8b34dfda2413be1ed10ff10/volumes/12d211dd-48b7-45d9-9154-75470931e85b',"
2019-07-27 01:20:36.252387 | controller | b" 'rel': 'bookmark'}],"
2019-07-27 01:20:36.252442 | controller | b" 'metadata': {},"
2019-07-27 01:20:36.253044 | controller | b" 'multiattach': False,"
2019-07-27 01:20:36.253127 | controller | b" 'name': 'tempest-TestMinimumBasicScenario-volume-1950148737',"
2019-07-27 01:20:36.253216 | controller | b" 'os-vol-tenant-attr:tenant_id': '862bd3e1e8b34dfda2413be1ed10ff10',"
2019-07-27 01:20:36.253280 | controller | b" 'replication_status': None,"
2019-07-27 01:20:36.253324 | controller | b" 'size': 1,"
2019-07-27 01:20:36.253373 | controller | b" 'snapshot_id': None,"
2019-07-27 01:20:36.253420 | controller | b" 'source_volid': None,"
2019-07-27 01:20:36.253470 | controller | b" 'status': 'available',"
2019-07-27 01:20:36.253542 | controller | b" 'updated_at': '2019-07-27T01:20:30.000000',"
2019-07-27 01:20:36.253611 | controller | b" 'user_id': '16e9467e3ed74b039c20d6103d69f9c5',"
2019-07-27 01:20:36.253672 | controller | b" 'volume_type': 'lvmdriver-1'}"
2019-07-27 01:20:36.253706 | controller | b''
2019-07-27 01:20:36.254049 | controller | b''