feat: remove hardcodes of exceptional course uuids and username for support notes

The values of these may vary across our environments, so it may be
useful for testing to be able to set these from the management command
arguments.

common/djangoapps/entitlements/management/commands/expire_and_create_entitlements.py

@@ -10,6 +10,7 @@ from textwrap import dedent
 
 from django.core.management import BaseCommand
 from django.contrib.auth import get_user_model
+
 from common.djangoapps.entitlements.tasks import expire_and_create_entitlements
 from common.djangoapps.entitlements.models import CourseEntitlement
 
@@ -17,16 +18,6 @@ logger = logging.getLogger(__name__)  # pylint: disable=invalid-name
 
 User = get_user_model()
 
-#course uuids for which entitlements should be expired after 18 months.
-MIT_SUPPLY_CHAIN_COURSES = [
-    '0d9b47982e3d486aa3189a7035bbda77',
-    '09532745c837467b9078093b8e1265a8',
-    '324970b703a444d7b39e10bbda6f119f',
-    '5f1c55b4354e4155af4a76450953e10d',
-    'ed927a1a4a95415ba865c3d722ac549c',
-    '6513ed9c112a495182ad7036cbe52831',
-]
-
 
 class Command(BaseCommand):
     """
@@ -60,21 +51,38 @@ class Command(BaseCommand):
             help='How many entitlements to give each celery task'
         )
 
+        parser.add_argument(
+            '--username',
+            required=True,
+            help='Username to record in CourseEntitlementSupportDetail as author of operation.'
+        )
+
+        parser.add_argument(
+            '--exceptional-course-uuids',
+            action='extend',
+            nargs='+',
+            default=[],
+            help='Space separated list of course UUIDs that should be expired in 18 months instead of 12 months.'
+        )
+
     def handle(self, *args, **options):
 
         logger.info('Looking for entitlements which may be expirable.')
 
-        support_user = User.objects.get(username='cbrash-edx')
+        support_user = User.objects.get(username=options.get('username'))
         current_date = date.today()
+        exceptional_courses = options.get('exceptional_course_uuids')
+
         expiration_period = current_date - relativedelta(years=1)
         exceptional_expiration_period = current_date - relativedelta(years=1, months=6)
+
         normal_entitlements = CourseEntitlement.objects.filter(
             expired_at__isnull=True, created__lte=expiration_period,
-            enrollment_course_run__isnull=True).exclude(course_uuid__in=MIT_SUPPLY_CHAIN_COURSES)
+            enrollment_course_run__isnull=True).exclude(course_uuid__in=exceptional_courses)
 
         exceptional_entitlements = CourseEntitlement.objects.filter(
             expired_at__isnull=True, created__lte=exceptional_expiration_period,
-            enrollment_course_run__isnull=True, course_uuid__in=MIT_SUPPLY_CHAIN_COURSES)
+            enrollment_course_run__isnull=True, course_uuid__in=exceptional_courses)
 
         entitlements = normal_entitlements | exceptional_entitlements
         logger.info('Total entitlements that have reached expiration period are %d ', entitlements.count())