oslo.db 0.4.0 breaks manila testsuite

[Andreas Jaeger]

Currently all python2.6 and python2.7 tests fail in manila. Downgrading to oslo.db 0.3.0 fixes the issue for me.

For list of failures, see:
https://review.openstack.org/#/q/project:stackforge/manila,n,z

[Andreas Jaeger (jaegerandi)]

to check that my local testing is correct, I created:
https://review.openstack.org/116043

[Viktor Serhieiev (vsergeyev)]

Seems to be, that this heppens, because BaseMigrationTestCase class was removed from oslo.db code. We had a similar issue in Heat. To fix it we decided to use an another approach for migration testing - see [1]
I can make a similar patch to Manila tomorrow (it's a late time in my country now)

[1] https://review.openstack.org/#/c/109658/6/heat/tests/db/test_migrations.py

[Viktor Serhieiev (vsergeyev)]

See patch https://review.openstack.org/#/c/116192/

[OpenStack Infra (hudson-openstack)]

Change abandoned by Andreas Jaeger (<email address hidden>) on branch: master
Review: https://review.openstack.org/116043
Reason: not needed, proper fix in the queu

[OpenStack Infra (hudson-openstack)]

Reviewed: https://review.openstack.org/116192
Committed: https://git.openstack.org/cgit/stackforge/manila/commit/?id=b08146204647b3742c6ca52e3e0461ed1e244a8a
Submitter: Jenkins
Branch: master

commit b08146204647b3742c6ca52e3e0461ed1e244a8a
Author: Victor Sergeyev <email address hidden>
Date: Fri Aug 22 10:24:27 2014 +0300

    Use opportunistic migrations

    Refactored migration tests to use OpportunisticTestCase, removed
    unused code, BaseMigrationTestCase class and ``test_migrations.conf``
    file.
    Added workaround for bug 1359982 to be able to merge this patch.

    Closes-Bug: #1359888
    Related-Bug: #1359982

    Change-Id: Iade2bd2bf50880e167c5a5be8b1236c437f28702