disabled test_count_overlap to avoid too much memory usage
disabled test_count_overlap to avoid too much memory usage

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