j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/tryWithResource/WithCatch.kt

@@ -0,0 +1,16 @@
+import java.io.*
+
+public class C {
+    fun foo() {
+        try {
+            ByteArrayInputStream(ByteArray(10)).use { stream ->
+                // reading something
+                val c = stream.read()
+                System.out.println(c)
+            }
+        } catch (e: IOException) {
+            System.out.println(e)
+        }
+
+    }
+}