Python 3.6/3.7 are no longer supported for the latest releasese of
the OpenStack packages like oslo or coverage, thus switching to the Zed
OpenStack release gates, which have support for 3.8/3.9/3.10 Python
versions.
For gates to pass, the docs required a defined language to be set ("en"),
while the crypto unit tests required a method signature fix when running
on Python 3.9/3.10.
The version test__check_latest_version* unit tests started failing
in a transient pattern because of the
pbr.version.VersionInfo().release_string() throwing the following error:
"NotImplementedError: cannot instantiate 'WindowsPath' on your system".
This required to have the cloudbaseinit.version.get_version mocked for a
reliable unit test run on Linux.
Change-Id: I4748d1258c072c377825474e1116347b0a085c56
1a32d738de