setting id for distribution bar

Signed-off-by: asharani-murugesh <asharani.murugesh@in.bosch.com>

hawkbit-ui/src/main/java/org/eclipse/hawkbit/ui/customrenderers/client/renderers/StringDistributionBarRenderer.java

@@ -43,6 +43,7 @@ public class StringDistributionBarRenderer extends WidgetRenderer<String, GwtDis
                     setThePartDetails(widget, map);
                 }
             }
+            widget.getElement().setId("rollout.status.progress.bar.id");
             widget.updateParts();
         }
     }