tests/test_nanshe_learner.py: Reduces number of drmaa cores.
tests/test_nanshe_learner.py: Move all test files to the home directory to ensure they will be shared amongst qsubed jobs.
tests/test_nanshe_learner.py: Turn off teardown.
tests/test_nanshe_learner.py: Revert tempfile.tempdir to the default value.
nanshe/nanshe_learner.py: Set cwd.