remove isolation on joblib test

Author: JATAYU000

tests/test_runs/test_run_functions.py

@@ -1959,13 +1959,12 @@ def test__run_task_get_arffcontent_2(parallel_mock):
     [
         # `None` picks the backend based on joblib version (loky or multiprocessing) and
         # spawns multiple processes if n_jobs != 1, which means the mock is not applied.
-        #TODO njob>1 isolated
-        #(2, None, 0),
-        #(-1, None, 0),
+        (2, None, 0),
+        (-1, None, 0),
         (1, None, 10),  # with n_jobs=1 the mock *is* applied, since there is no new subprocess
         (1, "sequential", 10),
         (1, "threading", 10),
-        #(-1, "threading", 10),  # the threading backend does preserve mocks even with parallelizing
+        (-1, "threading", 10),  # the threading backend does preserve mocks even with parallelizing
     ]
 )
 @pytest.mark.test_server()