Lowercase result file name

[Jozef Hartinger]

Hi,

I noticed that JMH converts the result file name to lowercase before 
writing the result. This clashes with our versioning strategy as we get e.g:

3.0.0.alpha3.csv instead of 3.0.0.Alpha3 or
3.0.0-snapshot instead of 3.0.0-SNAPSHOT

I'm wondering what is the reason for doing this. It would make our life 
(and scripts) a bit easier if JMH could preserve the original file name.

Thanks!

Jozef