oslo.db now requires testresources/testscenarios at runtime

[Matt Riedemann]

Change https://review.openstack.org/#/c/120870/ moved the testresouces requirement from test-requirements* to requirements.txt, this means that any distro that wants to package and ship oslo.db >= 1.5.0 has to provide testresources at runtime too if they are matching what's in requirements.txt, which seems wrong.

Looking at what's using testresources outside of tests, it's the provision module:

https://review.openstack.org/#/c/120870/24/oslo_db/sqlalchemy/provision.py

And that's only imported in non-test code in oslo_db.sqlalchemy.utils.is_backend_avail which is deprecated, and that method is only called from other test code, so even though testresources is imported in provision which isn't under tests, it seems that testresources should still be under test-requirements since that's what it's used for, testing of multiple backends.

[Matt Riedemann (mriedem)]

https://review.openstack.org/#/c/162272/

[Matt Riedemann (mriedem)]

New patch: https://review.openstack.org/#/c/162276/

[Doug Hellmann (doug-hellmann)]

The discussion of the policy related to dependency management in the libraries is on the spec proposed in https://review.openstack.org/157135

[Matt Riedemann (mriedem)]

Patch: https://review.openstack.org/#/c/217347/

[Davanum Srinivas (DIMS) (dims-v)]

Fixed in https://review.openstack.org/#/c/184328/