Setuptools v54.1.0 introduces a warning that the use of dash-separated
options in 'setup.cfg' will not be supported in a future version [1].
Get ahead of the issue by replacing the dashes with underscores. Without
this, we see 'UserWarning' messages like the following on new enough
versions of setuptools:

  UserWarning: Usage of dash-separated 'description-file' will not be
  supported in future versions. Please use the underscore name
  'description_file' instead

[1] https://github.com/pypa/setuptools/commit/a2e9ae4cb

Change-Id: I01ed896fb685dc6e8873b26942fa1c85c897a25f

Make possible installation with pip.
Change-Id: I8eec015142c4f29eadff0dac2781782b76dea308

Use the openstacksdk base functional test instead of going all
the way back to devstack for our base. Also - defining a job
starting with openstacksdk in this repo is not ok - but that
probably just came from the original copy-pasta coming from the
sdk repo.

Use tox-siblings more and stop doing tox requirements of ../
things. The system is there and we can use it.

Add jobs to test against released openstacksdk and ansible, as well
as a non-voting to test against ansible devel branch.

Add openstacksdk to the test-requirements because it's super
required.

Move zuul.yaml to .zuul.yaml. This isn't a zuul jobs repo so
we should just make it a hidden file rather than a non-hidden.

Change-Id: I658bd1728629cd358bc17a7f00d282d04530d8fe