Read file of a project and download it

        :param image_type: Image type
        :param image: The path of the image
        :returns: A file stream

def download_image(self, image_type, image):
        """
        Read file of a project and download it

        :param image_type: Image type
        :param image: The path of the image
        :returns: A file stream
        """

        url = self._getUrl("/{}/images/{}".format(image_type, image))
        response = yield from self._session().request("GET", url, auth=self._auth)
        if response.status == 404:
            raise aiohttp.web.HTTPNotFound(text="{} not found on compute".format(image))
        return response