Taskflow requires oslotest >= 1.1.0 which is not enough

[Thomas Goirand]

Building the Taskflow package for Debian, with version 2.3.0 of oslotest, I had about 25 unit test failures if using Py3.5 in Debian Sid + Experimental. Within the OpenStack infra CI, building the same package with oslotest 2.5.0 was no issue. I can also confirm that upgrading oslotest to 2.10.0 in my Sid machine fixed the problem.

So oslotest 1.1.0 in global-requirements.txt is just wrong, and shall be fixed.

I very much know that release managers don't like such "fix" of our global-requirements.txt so close from the release, because there's the rule that we want them to be propagated everywhere. It is however my opinion that it doesn't really mater to sync them on time on all project: what counts is co-instability (which wouldn't be broken by such a fix) and that these packages that *really* need a given minimum have it set correctly in test-requirements.txt. Having it wrong should be considered an RC bug.

Cheers,

Thomas Goirand (zigo)

P.S: Thanks harlowja for his help investigating the issue.