Parameterized configuration template given as string with dynamic parameters.

        :param config: a string with configuration template to be parameterized

        :param parameters: dynamic parameters to inject into the template

        :return: a parameterized configuration string.

def _parameterize(self, config, parameters):
        """
        Parameterized configuration template given as string with dynamic parameters.

        :param config: a string with configuration template to be parameterized

        :param parameters: dynamic parameters to inject into the template

        :return: a parameterized configuration string.
        """
        parameters = self._parameters.override(parameters)
        return pystache.render(config, parameters)