Add test for overriding bean property

Author: Kordyjan

tests/run/beans.check

@@ -1,5 +1,6 @@
 4
 true
+10
 [@beans.LibraryAnnotation_1()]
 some text
 other text

tests/run/beans/A_2.scala

@@ -1,9 +1,17 @@
-class A {
+class A:
   @scala.beans.BeanProperty val x = 4
   @scala.beans.BooleanBeanProperty val y = true
   @scala.beans.BeanProperty var mutableOneWithLongName = "some text"
 
   @scala.beans.BeanProperty
   @beans.LibraryAnnotation_1
   val retainingAnnotation = 5
-}
+
+trait T:
+  @scala.beans.BeanProperty val x: Int
+
+class T1 extends T:
+  override val x = 5
+
+class T2 extends T1:
+  override val x = 10

tests/run/beans/Test_3.java

@@ -5,6 +5,7 @@ public A run() throws ReflectiveOperationException{
     A a = new A();
     System.out.println(a.getX());
     System.out.println(a.isY());
+    System.out.println(new T2().getX());
 
     System.out.println(Arrays.asList(a.getClass().getMethod("getRetainingAnnotation").getAnnotations()));