Remove datetime from test cases
Remove the import and usage of datetime in all test cases: Use print_log instead Changes to be committed: modified: 110-limit-switches-halt-disable.py modified: 111-move-abs-vel-halt-in-target.py modified: 112-move-abs-new-position.py modified: 121-MoveVel-no-LS.py modified: 122-MoveVelAbs-into-LS.py modified: 150-slit-test.py