Add back in the UUID upgrade classes just in case anyone from 2014 shows

up

src/main/java/com/gmail/nossr50/util/uuid/UUIDFetcher.java

@@ -104,6 +104,6 @@ public class UUIDFetcher implements Callable<Map<String, UUID>> {
     }
 
     public static UUID getUUIDOf(String name) throws Exception {
-        return new UUIDFetcher(Collections.singletonList(name)).call().get(name);
+        return new UUIDFetcher(Arrays.asList(name)).call().get(name);
     }
-}
+}