Add loggers as another sample

[zafarella]

Short description

Would be nice to have a samples of the logging capabilities with some variety.

Details

It takes a bit longer to search libs to configure the logger. Would be nice if existing samples or new will be introduced for this purposes.

[johanandren]

I don't think we want to maintain separate samples for logging in addition to the docs here. Hopefully both how easy it is to get right and how well documented it is has improved with 2.6 though.