JS: move more test to box tests

js/js.translator/testData/box/examples/initializerBlockDImpl.kt

@@ -0,0 +1,20 @@
+import java.util.*
+import java.io.*
+
+class World() {
+    public val items: ArrayList<Item> = ArrayList<Item>()
+
+    inner class Item() {
+        init {
+            items.add(this)
+        }
+    }
+
+    val foo = Item()
+}
+
+fun box() : String {
+    val w = World()
+    if (w.items.size != 1) return "fail"
+    return "OK"
+}