j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/newClassExpression/newInnerClass.java

@@ -0,0 +1,14 @@
+//file
+package org.test;
+
+class OuterClass {
+  class InnerClass {
+  }
+}
+
+class User {
+  void main() {
+    OuterClass outerObject = new OuterClass();
+    OuterClass.InnerClass innerObject = outerObject.new InnerClass();
+  }
+}