j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/constructors/withManyDefaultParams.java

@@ -0,0 +1,24 @@
+public class Test {
+  private final String myName;
+  boolean a;
+  double b;
+  float c;
+  long d;
+  int e;
+  protected short f;
+  protected char g;
+
+  public Test() {}
+
+  public Test(String name) {
+    myName = foo(name);
+  }
+
+  static String foo(String n) {return "";}
+}
+
+public class User {
+  public static void main() {
+     Test t = new Test("name");
+  }
+}