The version requirement for requests need to be quoted not to lead into
a pip install command issue.
This is related to PR #1089 (Pin requests to < 2.29 temporarily)
Some tasks used to setup Azure environment might fail to temporary
errors like timeouts and connection failures. Allowing the tasks to
retry a few times will allow the test to be correctly executed rather
than returning an error that is not related to the feature tested.
Newer Ansible versions will require at least Python 3.8 to be used,
and the build containers pipeline was requiring Python 3.6, which is
EOL.
This patch requests the latest Python version available for the
controller, and allows it to be configured to a specific version if,
and when, needed.
Without explicit installation, Ansible was failing to run on
Azure pipelines. This change explicitly install the latest
Ansible version available through `pip`.
Added a pipeline file (tests/azure/build-containers.yml) to build test
containers and upload them to quay.io. The pipeline will create
containers with IPA pre-installed for testing proposes on three
different Linux containers: CentOS 7, CentOS 8 and Fedora Latest.
