add requires_gpfs

tests/test_gotthard2lib.py

@@ -3,6 +3,7 @@ import pytest
 from cal_tools.gotthard2.gotthard2lib import sort_dark_runs_by_gain
 
 
+@pytest.mark.requires_gpfs
 def test_sort_dark_runs_by_gain():
     # TODO: update used raw data to test data when available.
     raw_folder = "/gpfs/exfel/exp/FXE/202231/p900298/raw"
@@ -12,6 +13,7 @@ def test_sort_dark_runs_by_gain():
     assert sorted_runs == [7, 8, 9]
 
 
+@pytest.mark.requires_gpfs
 def test_raise_sort_dark_runs_by_gain():
     # TODO: update used raw data to test data when available.
     raw_folder = "/gpfs/exfel/exp/SA1/202331/p900384/raw"