j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/switch/fallDownWithBlocks.kt

@@ -0,0 +1,25 @@
+public class C {
+    class object {
+        public fun main(args: Array<String>) {
+            when (args.size) {
+                1 -> {
+                    run {
+                        val a = 1
+                        System.out.print("1")
+                    }
+                    run {
+                        val a = 2
+                        System.out.print("2")
+                    }
+                }
+
+                2 -> {
+                    val a = 2
+                    System.out.print("2")
+                }
+            }
+        }
+    }
+}
+
+fun main(args: Array<String>) = C.main(args)