[wip] sampledna will now use a calc for success or failure. (needs
reviewed for accuracy) and put an average dna sample in your inventory
(no stats). But command works, generates xp and gives a dummy sample
object. this should be good for QA to atleast test the rules about
sampling like range, count death etc.. till a template is made for the
samples themselves.

Updated: all parts of sampledna now works. generated generic dna
templates are set to 1 for all stats right now. 
Update: missed HarvestCreaturecommand change.

Updated: As per Onyx and Fivo as long as you didnt kill the creature
by samlping you can still harvest it.

Change-Id: Ibe68910e12d0f60858a3af8e6800dfd21e3960b4