This PR passes the CERTBOT_NO_PIN environment variable to the unit tests tox envs. By setting CERTBOT_NO_PIN to 1 before executing a given tox env, certbot dependencies will be installed at their latest version instead of the usual pinned version.
I also moved the unpin logic one layer below to allow it to be used potentially more widely, and avoid unnecessary merging constraints operation in this case.
As warnings are errors now, latest versions of Python will break now the tests, because collections launch a warning when some classes are imported from collections instead of collections.abc. Certbot code is patched, and warning is ignored for now, because a lot of third party libraries still depend on this behavior.
* Allow to execute a tox target without pinned dependencies
* Correct lint
* Retrigger build.
* Remove debug code
* Added test against unpinned dependencies from test-everything-unpinned-dependencies branch
* Remove duplicated assertion to pass TRAVIS and APPVEYOR in default tox environment.
Currently the release script in master fails for a few reasons. First, it's trying to use --numprocesses which comes from a pytest plugin that we're not installing in the release script. Second, many new warnings are raised when we're not using pinned versions of our dependencies.
I'm not sure I agree, but one could argue that we should fix these issues and use the file during the release. I'm particularly hesitant for us to do this when it comes to warnings. We currently do not pin our dependencies in the release script. Do we really want to stop the release because a new package was released and is warning about something? One could argue we do because these warnings may be visible to the user, but they very rarely are and I think this makes the release process much too painful.
I especially do not think we should block the release on this now as we are not up to date on the warnings raised by the latest versions of our packages so there is a lot to work through.
* Don't use pytest.ini during the release.
* State that pytest.ini isn't used in release script.
