Add cache size adjuster to multi-threaded hash table tester.
Add cache size adjuster to multi-threaded hash table tester.

ged-lab/khmer,Winterflower/khmer,F1000Research/khmer,souravsingh/khmer,jas14/khmer,F1000Research/khmer,kdmurray91/khmer,ged-lab/khmer,ged-lab/khmer,F1000Research/khmer,kdmurray91/khmer,Winterflower/khmer,souravsingh/khmer,jas14/khmer,kdmurray91/khmer,Winterflower/khmer,souravsingh/khmer,jas14/khmer