TagDbObjectTestCase.test_objects_exist_validate_filters_false may fail because of non-unique id for standardattributes

http://logs.openstack.org/00/425800/5/gate/gate-neutron-python35/325d0d1/testr_results.html.gz

Traceback (most recent call last):
  File "/home/jenkins/workspace/gate-neutron-python35/neutron/tests/unit/objects/test_tag.py", line 33, in setUp
    lambda: self._create_test_standard_attribute_id()
  File "/home/jenkins/workspace/gate-neutron-python35/neutron/tests/unit/objects/test_base.py", line 576, in update_obj_fields
    val = v() if callable(v) else v
  File "/home/jenkins/workspace/gate-neutron-python35/neutron/tests/unit/objects/test_tag.py", line 33, in <lambda>
    lambda: self._create_test_standard_attribute_id()
  File "/home/jenkins/workspace/gate-neutron-python35/neutron/tests/unit/objects/test_base.py", line 1381, in _create_test_standard_attribute_id
    self.context, standard_attr.StandardAttribute, attrs)['id']
  File "/home/jenkins/workspace/gate-neutron-python35/neutron/objects/db/api.py", line 61, in create_object
    context.session.add(db_obj)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 567, in __exit__
    self.rollback()
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/util/compat.py", line 187, in reraise
    raise value
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 564, in __exit__
    self.commit()
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 461, in commit
    self._prepare_impl()
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 430, in _prepare_impl
    self.session.dispatch.before_commit(self.session)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/event/attr.py", line 218, in __call__
    fn(*args, **kw)
  File "/home/jenkins/workspace/gate-neutron-python35/neutron/db/api.py", line 283, in load_one_to_manys
    session.flush()
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 2139, in flush
    self._flush(objects)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 2259, in _flush
    transaction.rollback(_capture_exception=True)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/util/langhelpers.py", line 66, in __exit__
    compat.reraise(exc_type, exc_value, exc_tb)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/util/compat.py", line 187, in reraise
    raise value
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/session.py", line 2223, in _flush
    flush_context.execute()
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/unitofwork.py", line 389, in execute
    rec.execute(self)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/unitofwork.py", line 548, in execute
    uow
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/persistence.py", line 181, in save_obj
    mapper, table, insert)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/orm/persistence.py", line 799, in _emit_insert_statements
    execute(statement, multiparams)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 945, in execute
    return meth(self, multiparams, params)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/sql/elements.py", line 263, in _execute_on_connection
    return connection._execute_clauseelement(self, multiparams, params)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1053, in _execute_clauseelement
    compiled_sql, distilled_params
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1189, in _execute_context
    context)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1398, in _handle_dbapi_exception
    util.raise_from_cause(newraise, exc_info)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/util/compat.py", line 203, in raise_from_cause
    reraise(type(exception), exception, tb=exc_tb, cause=cause)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/util/compat.py", line 186, in reraise
    raise value.with_traceback(tb)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/engine/base.py", line 1182, in _execute_context
    context)
  File "/home/jenkins/workspace/gate-neutron-python35/.tox/py35/lib/python3.5/site-packages/sqlalchemy/engine/default.py", line 470, in do_execute
    cursor.execute(statement, parameters)
oslo_db.exception.DBDuplicateEntry: (sqlite3.IntegrityError) UNIQUE constraint failed: standardattributes.id [SQL: 'INSERT INTO standardattributes (id, resource_type, description, revision_number, created_at, updated_at) VALUES (?, ?, ?, ?, ?, ?)'] [parameters: (801, '232a', None, 1, '2017-04-16 00:06:13.000000', None)]

That's because _create_test_standard_attribute_id doesn't track uniqueness for ids used.