Install ansible-playbook using pip3
    
    Sometimes ansible is not available as rpm in repositories, but it should
    be possible to install ansible using pip3
    
    Fixes:
        [   FAIL   ] :: Checking for the presence of ansible rpm
        [   FAIL   ] :: Command 'ansible-playbook -i localhost, -c local -v tests_all_purge.yml' (Expected 0, got 127)