Initialize filename with blob name in FileImporterContext

Since 11.1 if the file name of the  FileImporterContext is missing then it will be filled with the Blob's file name. This means that you no longer need to add control to avoid an empty filename outside of the FileImporterContext class, for example see the snippet code below  AudioImporter :  // code placeholder @@ -57,8 +56,7 @@ public class AudioImporter extends AbstractFileImporter { CoreSession session = context.getSession(); Blob blob = context.getBlob(); - String filename = FileManagerUtils.fetchFileName( - StringUtils.defaultIfBlank(context.getFileName(), blob.getFilename())); + String filename = FileManagerUtils.fetchFileName(context.getFileName());