SUPPORT-8507: fix задания паузы

src/main/java/ru/micord/ervu/av/service/FileUploadService.java

@@ -216,7 +216,8 @@ public class FileUploadService {
 
         // waiting for timeout time before first request
         try {
-          TimeUnit.MILLISECONDS.sleep(avFirstTimeoutMilliseconds);
+          TimeUnit.MILLISECONDS.sleep(
+              avFirstTimeoutMilliseconds == null ? 1000L : avFirstTimeoutMilliseconds);
         }
         catch (InterruptedException e) {
           throw new FileUploadException(e);