[4794] Added name, surname and avatar of user.

https://gist.github.com/8r2y5/28d5f18d84187001d4b3 - pylint & nosetest
https://bugzilla.stxnext.pl/show_bug.cgi?id=4794 - ticket
```name``` should never be ```None``` here?

Also doesn't ```get_data_v2``` return exactly same dict, but without this check?