j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/class/ClassShadowing.kt

@@ -0,0 +1,19 @@
+package test
+
+public class Short {
+    class object {
+        public fun valueOf(value: String): Short {
+            return Short()
+        }
+    }
+}
+
+class Test {
+    class object {
+        public fun test() {
+            test.Short.valueOf("1")
+            test.Short.valueOf("1")
+            java.lang.Short.valueOf("1")
+        }
+    }
+}