public void handle(Directory directory, Metadata metadata) throws MetadataException {
            if (directory.getTags() != null) {
                for (Tag tag : directory.getTags()) {
                    if (directory instanceof ExifDirectoryBase) {
                        metadata.set(directory.getName() + ":" + tag.getTagName(),
                                tag.getDescription());
                    } else {
                        metadata.set(tag.getTagName(), tag.getDescription());
                    }
                }
            }
        }
Mimics the behavior from TIKA-314 of copying all extracted tags
to tika metadata using field names from Metadata Extractor.
tika-parsers/tika-parsers-standard/tika-parsers-standard-modules/tika-parser-image-module/src/main/java/org/apache/tika/parser/image/ImageMetadataExtractor.java