Fix the parser for the .fi TLD (Closes: #42)

[elguitar]

The whole response format was changed in 2016, this PR changes the tests, the scanner and the parser in order to respond to the change.

[jarthod]

Thanks for this @elguitar, for the record I ended up starting my fork in which I merged some of the pending PRs (including yours slightly adapted in a5b0f63506671aa8b36798ebca0abb16bc0ed8eb) and more fixes to come. So people who need this can use my fork in the meantime:

gem 'whois-parser', github: 'jarthod/whois-parser' # Unofficial but more up-to-date fork, check status at https://github.com/jarthod/whois-parser