Tests should use the Python built-in ``venv`` module on Python 3 instead of the standalone ``virtualenv`` module.
On Python 2 the ``virtualenv`` module continues to be the only option.
The version installed is either the OS packaged version or the last release to support Python 2, which is version 16.7.10.
Also pin virtualenv to 16.7.10 for older Mac OS X systems. This was the version being installed
anway with the previous constraint (<20).
On systems with Python 3, now prefer venv over virtualenv. Test to see if venv is functional since
some systems have a non-functional venv installation (such as Debian).
The `packaging` and `pyparsing` packages are now installed by `ansible-test` during provisioning of RHEL instances to match the downstream vendored versions.
* Testing: Add CentOS Linux On Power platform
* Add arch designation to remotes.
This avoids overloading the provider with the arch.
Also add a changelog entry.
Co-authored-by: Matt Clay <matt@mystile.com>
Newer versions of ssh-keygen create PEM keys that are not recognized by Paramiko.
Now ansible-test compensates for this by updating they keys it generates so Paramiko will recognize them.
