def runOne(test):
    test = PresenterTestCase(test)
    suite = unittest.TestSuite([test])
    unittest.TextTestRunner(verbosity=2).run(suite)
split a list into 2 lists based on the fraction provided. Used to break the instances into 
dataset/ETHPy150Open saltstack/salt/salt/daemons/test/test_presence.py/runOne--crossover with--dataset/ETHPy150Open japerk/nltk-trainer/train_classifier.py/split_list