iron_cuke daemon check for usernames > 8 characters

Hi. 

I added in the functionality to cuken so it correctly verifies usernames > 8 characters by replacing the username with the UID.  

The problem being that Linux replaces the username with the UID if the username is > 8 characters.  process.rb file did not take this into account so verifications failed for zookeeper user (and others).  

Thanks,
Brandon