This disables the generation of the collection using the default
galaxy.yml. The installation of the generated collection fails with
invalid version A.B.C.
The collection is not used when building containers and the generated
collection is not using proper name and namespace in the collection files.
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.
* Adapted tests/test_playbook_runs.py script to allow tests to be
executed from a docker container.
* Added molecule scenarios to create/destroy test containers and
respective documentation in tests/README.md.
