j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/constructors/noPrimary.java

@@ -0,0 +1,21 @@
+class C {
+  C(int arg1, int arg2, int arg3) {
+  }
+
+  C(int arg1, int arg2) {
+    this(arg1, arg2, 0);
+    System.out.println();
+  }
+
+  C(int arg) {
+    System.out.println(arg);
+  }
+}
+
+public class User {
+  public static void main() {
+     C c1 = new C(1, 2, 3);
+     C c2 = new C(5, 6);
+     C c3 = new C(7);
+  }
+}