cli: log stack trace as debug when the commands return an error

[BrunoRosendo]

In the Python client, every command logs a stack trace, as debug level, before exiting the program. In the GO client, this currently doesn't happen. This can be tricky and it'd be nice to have a general way to do this, since we return errors at many different places and it wouldn't be nice to print the stack trace in all of them.
Maybe error wrapping is worth exploring but it could be hard to integrate it with the swagger api errors