j2k: flatten test cases and testData directory structure

Move j2k/test/tests -> j2k/tests, j2k/test/testData -> j2k/testData

j2k/testData/fileOrElement/issues/kt-809-string.kt

@@ -0,0 +1,23 @@
+package demo
+
+class Container {
+    var myString = "1"
+}
+
+class One {
+    class object {
+        var myContainer = Container()
+    }
+}
+
+class StringContainer(s: String)
+
+class Test {
+    fun putString(s: String) {
+    }
+
+    fun test() {
+        putString(One.myContainer.myString)
+        StringContainer(One.myContainer.myString)
+    }
+}