Use Java 5 LinkedList API, not Java 6. Note that removeFirstOccurrence(Object) delegates to remove(Object) in Java 6.

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/lang/trunk@1199798 13f79535-47bb-0310-9956-ffa450edef68

src/test/java/org/apache/commons/lang3/builder/ReflectionToStringBuilderMutateInspectConcurrencyTest.java

@@ -55,7 +55,7 @@ public synchronized void add() {
         }
 
         public synchronized void delete() {
-            listField.removeFirstOccurrence(Integer.valueOf(random.nextInt(N)));
+            listField.remove(Integer.valueOf(random.nextInt(N)));
         }
     }