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

js/js.translator/testData/box/dataClass/keyrole.kt

@@ -0,0 +1,23 @@
+package foo
+
+data class Holder<T>(val v: T)
+
+data class Dat(val start: String, val end: String)
+
+class Obj(val start: String, val end: String)
+
+fun box(): String {
+    val setD = java.util.HashSet<Holder<Dat>>()
+    setD.add(Holder(Dat("a", "b")))
+    setD.add(Holder(Dat("a", "b")))
+    setD.add(Holder(Dat("a", "b")))
+    assertEquals(1, setD.size)
+
+    val setO = java.util.HashSet<Holder<Obj>>()
+    setO.add(Holder(Obj("a", "b")))
+    setO.add(Holder(Obj("a", "b")))
+    setO.add(Holder(Obj("a", "b")))
+    assertEquals(3, setO.size)
+
+    return "OK"
+}