allow duplicate in AnnotationUtils.findAnnotations result

See also WW-4912

core/src/main/java/com/opensymphony/xwork2/util/AnnotationUtils.java

@@ -177,12 +177,12 @@ public class AnnotationUtils {
         classes.addAll(ClassUtils.getAllInterfaces(clazz));
         for (Class<?> aClass : classes) {
             T ann = aClass.getAnnotation(annotationClass);
-            if (ann != null && !anns.contains(ann)) {
+            if (ann != null) {
                 anns.add(ann);
             }
 
             ann = aClass.getPackage().getAnnotation(annotationClass);
-            if (ann != null && !anns.contains(ann)) {
+            if (ann != null) {
                 anns.add(ann);
             }
         }

core/src/test/java/com/opensymphony/xwork2/util/AnnotationUtilsTest.java

@@ -58,7 +58,7 @@ public class AnnotationUtilsTest extends TestCase {
         assertThat(annotations)
                 .isNotNull()
                 .isNotEmpty()
-                .hasSize(4);
+                .hasSize(5);
 
         Set<String> values = new HashSet<>();
         for (MyAnnotation annotation : annotations) {