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

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

@@ -0,0 +1,26 @@
+package foo
+
+open class A() {
+
+    var order = ""
+    init {
+        order = order + "A"
+    }
+}
+
+open class B() : A() {
+    init {
+        order = order + "B"
+    }
+
+}
+
+class C() : B() {
+    init {
+        order = order + "C"
+    }
+}
+
+fun box(): String {
+    return if ((C().order == "ABC") && (B().order == "AB") && (A().order == "A")) "OK" else "fail"
+}