* ``common`` role

  * Dropped support for Python 2.7 pip requirements upgrade

    checks. Only Python 3 is supported now.

    Requirements (input) files for Python 3 are now put under the

    ``/etc/pip_check_requirements_upgrades`` directory instead of

    ``/etc/pip_check_requirements_upgrades-py3``.

    The ``pip_check_requirements_py3`` /

    ``pip_check_requirements_py3_in`` role parameters have been

    renamed to ``pip_check_requirements`` /

    ``pip_check_requirements_in``.