Fix error messages regarding fact puppetversion

[dhoppe]

Please merge.

[cryptk]

I would love to work on some contributions to this module, but without functional tests, I don't have a good way to validate my work. If you have some spare time, any way that we can get this merged?

[dgolja]

tnx for all the help. Sorry had a busy few months doing my MSc but i am "back" :)