Intermittent issues reaching Ansible's galaxy for molecule
dependencies. This can be worked around by creating
tests/requirements.yml, which is parsed by default with
ansible-compat, and it does proceed with installation first.
If all dependencies are already present, molecule won't attempt
reaching galaxy. We see a lot of failures recently on CentOS 10
Stream.
Change-Id: Ibb5b8ec221998feac569e0d6e7a95bbea59c692f
Signed-off-by: Dmitriy Rabotyagov <dmitriy.rabotyagov@cleura.com>