Update several TODOs without ticket ID

DEVSIX-6246

Author: Evgeniy Prudnikov

layout/src/main/java/com/itextpdf/layout/renderer/AccessibleAttributesApplier.java

@@ -168,7 +168,7 @@ private static void applyCommonLayoutAttributes(AbstractRenderer renderer, PdfDi
             attributes.put(PdfName.BackgroundColor, new PdfArray(background.getColor().getColorValue()));
         }
 
-        //TODO NOTE: applying border attributes for cells is temporarily turned off on purpose. Remove this 'if' in future.
+        //TODO DEVSIX-6255: applying border attributes for cells is temporarily turned off on purpose. Remove this 'if' in future.
         // The reason is that currently, we can't distinguish if all cells have same border style or not.
         // Therefore for every cell in every table we have to write the same border attributes, which creates lots of clutter.
         if (!(renderer.getModelElement() instanceof Cell)) {

layout/src/test/java/com/itextpdf/layout/renderer/EmptyNestedTableTest.java

@@ -71,6 +71,7 @@ public static void beforeClass() {
     }
 
     @Test
+    //TODO DEVSIX-6255 Implementation of the application border attributes for cells
     public void buildEmptyTable() throws IOException, InterruptedException {
 
         String outFileName = destinationFolder + "emptyNestedTableTest.pdf";