DeprecationWarning: Using class 'DbFixture' (either directly or via inheritance) is deprecated: Please use oslo_db.sqlalchemy.test_fixtures directly

[Takashi Natsume]

In py35 testing (tox -e py35), the following deprecated warning is shown.
It should be fixed.

{6} nova.tests.unit.db.test_db_api.TestSqlalchemyTypesRepr.test_cidr_repr [0.032182s] ... ok

Captured stderr:
~~~~~~~~~~~~~~~~
    b"/tmp/nova/.tox/py35/lib/python3.5/site-packages/oslo_db/sqlalchemy/test_base.py:179: DeprecationWarning: Using class 'DbFixture' (either directly or via inheritance) is deprecated: Please use oslo_db.sqlalchemy.test_fixtures directly"
    b' self, skip_on_unavailable_db=self.SKIP_ON_UNAVAILABLE_DB))'
    b''

[OpenStack Infra (hudson-openstack)]

Fix proposed to branch: master
Review: https://review.openstack.org/609352

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/609352
Committed: https://git.openstack.org/cgit/openstack/nova/commit/?id=7748c754b96ae1e8d4feb8749391a5d61daeeb0b
Submitter: Zuul
Branch: master

commit 7748c754b96ae1e8d4feb8749391a5d61daeeb0b
Author: Takashi NATSUME <email address hidden>
Date: Wed Oct 10 17:28:05 2018 +0900

    Use oslo_db.sqlalchemy.test_fixtures

    Make use of the newer fixtures in oslo_db.sqlalchemy.test_fixtures
    which is what was intended to supersede fixtures
    in oslo_db.sqlalchemy.test_base.

    Change-Id: Icb88c13336fffb499083197ed864b8e4e45dc241
    Closes-Bug: #1797102

[OpenStack Infra (hudson-openstack)]

This issue was fixed in the openstack/nova 19.0.0.0rc1 release candidate.