Perform initial setup of the settings class, such as getting the settings module and setting the settings

def _setup(self):
        """
        Perform initial setup of the settings class, such as getting the settings module and setting the settings
        """
        settings_module  = None
        #Get the settings module from the environment variables
        try:
            settings_module = os.environ[global_settings.MODULE_VARIABLE]
        except KeyError:
            error_message = "Settings not properly configured.  Cannot find the environment variable {0}".format(global_settings.MODULE_VARIABLE)
            log.exception(error_message)

        self._initialize(settings_module)
        self._configure_logging()