added some tests for the distance tool. Still need to correct some bugs

distance_batsim_output.py

pytest.ini

test/__pycache__/test_distance.cpython-310-pytest-7.1.3.pyc

test/input/3jobs_1unsuccessful.csv

test/input/3jobs_w_sessions.csv

test/input/3jobs_zeros.csv

test/input/mc_10days_a60_jobs.csv

test/input/mc_10days_m60_jobs.csv

test/input/mc_10days_rigid_jobs.csv

test/test_distance.py