JS: create new common directory for all generated tests, migrate several tests there

js/js.translator/testData/box/inheritance/initializersOfBasicClassExecute.kt

@@ -0,0 +1,14 @@
+package foo
+
+open class A() {
+    var a = 3;
+}
+
+class B() : A() {
+
+}
+
+fun box(): String {
+    val a = B().a
+    return if (a == 3) "OK" else "Fail, a = $a"
+}