Adding migration to update the expiration_period default

common/djangoapps/entitlements/migrations/0007_change_expiration_period_default.py

+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+import datetime
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('entitlements', '0006_courseentitlementsupportdetail_action'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='courseentitlementpolicy',
+            name='expiration_period',
+            field=models.DurationField(default=datetime.timedelta(730), help_text=b'Duration in days from when an entitlement is created until when it is expired.'),
+        ),
+    ]