8221902: PIT: javax/swing/JRadioButton/FocusTraversal/FocusTraversal.java fails on ubuntu

Backport-of: 4071546

Author: GoeLin

test/jdk/ProblemList.txt

@@ -780,7 +780,6 @@ javax/swing/JComboBox/7031551/bug7031551.java 8199056 generic-all
 javax/swing/JScrollBar/6924059/bug6924059.java 8199078 generic-all
 javax/swing/JTabbedPane/TabProb.java 8236635 linux-all
 javax/swing/JTree/8003830/bug8003830.java 8199057 generic-all
-javax/swing/JRadioButton/FocusTraversal/FocusTraversal.java 8221902 linux-all,macosx-all
 javax/swing/ToolTipManager/Test6256140.java 8233560 macosx-all
 javax/swing/text/View/8014863/bug8014863.java 8233561 macosx-all
 javax/swing/text/StyledEditorKit/4506788/bug4506788.java 8233561 macosx-all

test/jdk/javax/swing/JRadioButton/FocusTraversal/FocusTraversal.java

@@ -134,6 +134,8 @@ public void run() {
     private static void runTestCase() throws Exception {
         focusOn(a);
 
+        robot.waitForIdle();
+        robot.delay(500);
         robot.keyPress(KeyEvent.VK_ENTER);
         robot.keyRelease(KeyEvent.VK_ENTER);
         robot.waitForIdle();
@@ -189,6 +191,7 @@ private static boolean tryLookAndFeel(String lookAndFeelString)
                 | IllegalAccessException e) {
             return false;
         }
+        System.out.println("Testing lookAndFeel " + lookAndFeelString);
         return true;
     }