j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/switch/continueAndBreakWithLabel.java

@@ -0,0 +1,12 @@
+//method
+void foo() {
+Loop:
+  while(true) {
+    switch(take()) {
+      case 1: continue;
+      case 2: System.out.println("2"); return;
+      case 3: break Loop;
+    }
+    System.out.println();
+  }
+}