Add "ImageGallery" to name of worker thread

ImageGallery/src/org/sleuthkit/autopsy/imagegallery/ImageGalleryController.java

@@ -659,7 +659,7 @@ synchronized private void shutDownDBExecutor() {
 
     private static ListeningExecutorService getNewDBExecutor() {
         return MoreExecutors.listeningDecorator(Executors.newSingleThreadExecutor(
-                new ThreadFactoryBuilder().setNameFormat("DB-Worker-Thread-%d").build()));
+                new ThreadFactoryBuilder().setNameFormat("ImageGallery-DB-Worker-Thread-%d").build()));
     }
 
     /**