Merge pull request #9 from junaid7haque/caseSensitivityUpdate

Made it so the validator only accepts lowercase category names

Author: junaid7haque

src/main/java/org/reactome/server/tools/IconValidator.java

@@ -102,7 +102,7 @@ private void validateXmlObj(File xmlFile, Icon icon) {
         System.out.println(countRef.incrementAndGet() + " / " + xmlNum + " xml files analysed (" + xmlFile.getName() + ")");
         List<String> categories = icon.getCategories();
         for (String category : categories) {
-            if (!CATEGORIES.contains(category.toLowerCase())) {
+            if (!CATEGORIES.contains(category())) {
                 errorLogger.error("[" + category + "] at the element \"category\" is not in the list CATEGORIES in the " + xmlFile.getName() + ".");
                 error.incrementAndGet();
             }