j2k: flatten test cases and testData directory structure

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

j2k/testData/fileOrElement/issues/kt-837.java

@@ -0,0 +1,20 @@
+//file
+package com.voltvoodoo.saplo4j.model;
+
+import java.io.Serializable;
+
+public class Language implements Serializable {
+        public static Language ENGLISH = new Language("en");
+        public static Language SWEDISH = new Language("sv");
+
+        protected String code;
+        private static final long serialVersionUID = -2442762969929206780L;
+
+        public Language(String code) {
+                this.code = code;
+        }
+
+        public boolean equals(Language other) {
+                return other.toString().equals(this.toString());
+        }
+}