Verify a Molecule config was found and returns None.

    :param configs: A list containing absolute paths to Molecule config files.
    :return: None

def _verify_configs(configs):
    """
    Verify a Molecule config was found and returns None.

    :param configs: A list containing absolute paths to Molecule config files.
    :return: None
    """
    if configs:
        scenario_names = [c.scenario.name for c in configs]
        for scenario_name, n in collections.Counter(scenario_names).items():
            if n > 1:
                msg = ("Duplicate scenario name '{}' found.  "
                       'Exiting.').format(scenario_name)
                util.sysexit_with_message(msg)

    else:
        msg = "'{}' glob failed.  Exiting.".format(MOLECULE_GLOB)
        util.sysexit_with_message(msg)