test: update num queries for bulk

edx_exams/apps/core/management/commands/test/test_bulk_add_course_staff.py

@@ -73,13 +73,14 @@ def test_add_course_staff_with_not_default_batch_delay(self):
 
     def test_num_queries_correct(self):
         """
-        Expect the number of queries to be 3 + 3 * number of lines
-        - 2 for savepoint/release savepoint, 1 for count check below, 1 to get existing usernames
-        - 3 for each user, assuming not existing (1 to create user, 1 to get user, 1 to add course role)
+        Expect the number of queries to be 5 + 1 * number of lines
+        - 2 for savepoint/release savepoint, 1 to get existing usernames,
+        - 1 to bulk create users, 1 to bulk create course role
+        - 1 for each user (to get user)
         """
         num_lines = 20
         lines = [f'pam{i},pam{i}@pond.com,staff,course-v1:edx+test+f20\n' for i in range(num_lines)]
         with NamedTemporaryFile() as csv:
             csv = self._write_test_csv(csv, lines)
-            with self.assertNumQueries(3 + 3 * num_lines):
+            with self.assertNumQueries(5 + num_lines):
                 call_command(self.command, f'--csv_path={csv.name}')