fix import order as the standard suggests

(use `isort`)

mpsd-software-environment.py

 #!/usr/bin/env python3
+import argparse
+import datetime
 import os
 import subprocess
-import datetime
-import argparse
 import sys
 from pathlib import Path
 from typing import List, Tuple

tests.py

-import os
-import pytest
 import importlib
-import subprocess
+import os
 import shutil
+import subprocess
 from pathlib import Path
 
+import pytest
+
 mod = importlib.import_module("mpsd-software-environment")