fe5f51c32f
We are outside the 4 week period that we dropped Ansible 2.7 (I13802db3314450ad149fdadacd1e2e70dd8468ef) so update the testing version to 2.8 here. The comment has become stale, as ansible-lint is now installed via linters-requirements.txt; remove the bit about how it will pull in the latest version of Ansible. Also clarify slightly the version usage. Later versions of Ansible only have paramiko support as a plugin. We have just one place we use it explicitly to generate some keys for testing; so it is really a dependency of zuul-jobs. Add it explicitly. Change-Id: Iad8622594a773af78487dec88e4ce5cc48806ded