Comment 82 for bug 1449062

Tristan: I'm still a little confused on the oslo.concurrency recommendation. Are you saying that we should suggest stable/liberty and stable/mitaka deployments to also use oslo.concurrency>=3.8.0? At the moment the tips of stable/liberty and stable/mitaka branches for oslo.concurrency are tagged 2.6.1 and 3.7.1 respectively (and that's what we have pinned in upper-constraints.txt for testing purposes as well). I don't want to imply in an advisory that all deployments should upgrade oslo.concurrency to 3.8.0 or later if there's a risk it will break liberty or mitaka deployments (which is why I was leaning toward not mentioning oslo.concurrency versions as that would just add to confusion).