Convert app to use Compose file 2

Signed-off-by: Ben Firshman <ben@firshman.co.uk>

vote-apps/worker/src/main/java/worker/Worker.java

@@ -8,8 +8,8 @@ import org.json.JSONObject;
 class Worker {
   public static void main(String[] args) {
     try {
-      Jedis redis = connectToRedis("voteapps_redis_1");
-      Connection dbConn = connectToDB("voteapps_db_1");
+      Jedis redis = connectToRedis("redis");
+      Connection dbConn = connectToDB("db");
 
       System.err.println("Watching vote queue");