Add Mongo-DB User and Password as Docker Secrets
Add Mongo-DB User and Password as Docker Secrets

Once Mongo-DB  User and Password are fully supported within the iot-node-lib, they should be made available obfuscated within Docker 

Related: https://github.com/telefonicaid/iotagent-node-lib/pull/852
telefonicaid/iotagent-json,telefonicaid/iotagent-json,telefonicaid/iotagent-json