Improved configuration for MongoDB connection. You need to enter your mongodb connection string #mongo.dburl=ENTER_YOUR_MONGO_DATABASE_URL in the defaultAppConfig.properties or even better in the myAppConfig.properties you can use with your own configuration.

A connection URL looks like (this one connects with 4 mongo DB combined in a replicaset):
mongodb://192.168.188.40:27017,192.168.188.40:27018,192.168.188.51:27017,192.168.188.51:27018