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.