Change column name in grade report

TNL-1244

lms/djangoapps/instructor_task/tasks_helper.py

@@ -555,7 +555,7 @@ def upload_grades_csv(_xmodule_instance_args, _entry_id, course_id, _task_input,
 
     partition_service = LmsPartitionService(user=None, course_id=course_id)
     partitions = partition_service.course_partitions
-    group_configs_header = ['Group Configuration Group Name ({})'.format(partition.name) for partition in partitions]
+    group_configs_header = ['Experiment Group ({})'.format(partition.name) for partition in partitions]
 
     # Loop over all our students and build our CSV lists in memory
     header = None

lms/djangoapps/instructor_task/tests/test_integration.py

@@ -627,7 +627,7 @@ class TestGradeReportConditionalContent(TestReportMixin, TestIntegrationTask):
 
         def user_partition_group(user):
             """Return a dict having single key with value equals to students group in partition"""
-            group_config_hdr_tpl = 'Group Configuration Group Name ({})'
+            group_config_hdr_tpl = 'Experiment Group ({})'
             return {
                 group_config_hdr_tpl.format(self.partition.name): self.partition.scheme.get_group_for_user(   # pylint: disable=E1101
                     self.course.id, user, self.partition, track_function=None