Collect the relevant label information in a map

FrontendController.java

          // After written to GCS, analyze the image.
            AnnotateImageResponse response =  analyzeImage(bucket + "/" + filename);

            Map<String, Float> imageLabels =
                    response.getLabelAnnotationsList()
                            .stream()
                            .collect(
                                    Collectors.toMap(
                                            EntityAnnotation::getDescription,
                                            EntityAnnotation::getScore,
                                            (u, v) -> {
                                                throw new IllegalStateException(String.format("Duplicate key %s", u));
                                            },
                                            LinkedHashMap::new));