j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/constructors/parameterDefaults3.java

@@ -0,0 +1,14 @@
+package pack
+
+class C {
+  C(int a, int b, int c, int d, int e) {
+  }
+
+  C(int a, int b, int c) {
+    this(b, a, c, 0, 0);
+  }
+
+  C() {
+    this(0, 0, 0, 0, 0);
+  }
+}