Refactor serial stuff.

Serial stuff has been populated with logger behavior and small fixes about NullPointerException.

* logger behavior
* avoid NPE
* constructor of [SerialConnection] with baud rate
Broker of a topics has been refactored.

Broker has been populated with logger behavior. Spring configuration file has been refactored.
Refactoring and logging in the remote module.

MQTT stuff has been populated with the logging behavior. Serial stuff has been refactored a bit.
Main application has been refactored.

Now, ZigBee serial device configurating while main application started.

* enable ZigBee data mode
* avoid serial echo
* avoid ZigBee response
SmartTV and Arduino services has refactored.

Services has been populated with logger behavior.