j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/switch/caseWithBlock.java

@@ -0,0 +1,20 @@
+//method
+void foo() {
+  switch(a) {
+    case 1: {
+      int x = 1;
+      System.out.println(x);
+      break;
+    }
+
+    case 2: {
+      int x = 2;
+      System.out.println(x);
+    }
+    break;
+
+    case 3: {
+        System.out.println(3);
+    }
+  }
+}