Return defined environments from config file for default
    environment values.

def get_environments():
    """
    Return defined environments from config file for default
    environment values.
    """
    config = ConfigParser.SafeConfigParser()

    config = _config_file()

    juicer.utils.Log.log_debug("Reading environment sections:")

    environments = config.sections()
    juicer.utils.Log.log_debug("Read environment sections: %s", ', '.join(environments))
    return environments