functional test broken

This started failing in the gate today:

 ==============================
 Failed 1 tests - output below:
 ==============================

 glance.tests.functional.db.migrations.test_ocata_migrate01.TestOcataMigrate01MySQL.test_walk_versions
 -----------------------------------------------------------------------------------------------------

 Captured traceback:
 ~~~~~~~~~~~~~~~~~~~
     b'Traceback (most recent call last):'
     b' File "/home/zuul/src/git.openstack.org/openstack/glance/glance/tests/functional/db/test_migrations.py", line 63, in test_walk_versions'
     b' with_data=True)'
     b' File "/home/zuul/src/git.openstack.org/openstack/glance/glance/tests/functional/db/test_migrations.py", line 57, in _migrate_up'
     b' check(engine, data)'
     b' File "/home/zuul/src/git.openstack.org/openstack/glance/glance/tests/functional/db/migrations/test_ocata_migrate01.py", line 133, in _check_ocata_expand01'
     b" self.assertEqual('private', rows[0]['visibility'])"
     b' File "/home/zuul/src/git.openstack.org/openstack/glance/.tox/py35/lib/python3.5/site-packages/testtools/testcase.py", line 411, in assertEqual'
     b' self.assertThat(observed, matcher, message)'
     b' File "/home/zuul/src/git.openstack.org/openstack/glance/.tox/py35/lib/python3.5/site-packages/testtools/testcase.py", line 498, in assertThat'
     b' raise mismatch_error'
     b"testtools.matchers._impl.MismatchError: 'private' != None"
     b''

I have not been able to reproduce locally (yet). This is from the zuul_info from a failing test:

Image Information
=================

/etc/dib-builddate.txt
----------------------
2018-01-22 21:42

/etc/image-hostname.txt
-----------------------
ubuntu-xenial