INCR-134: Run python-modernize on openedx/core/djangoapps/django_comment_common/migrations (#20484)

openedx/core/djangoapps/django_comment_common/migrations/0001_initial.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.conf import settings
 from django.db import migrations, models

openedx/core/djangoapps/django_comment_common/migrations/0002_forumsconfig.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 import django.db.models.deletion
 from django.conf import settings

openedx/core/djangoapps/django_comment_common/migrations/0003_enable_forums.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

openedx/core/djangoapps/django_comment_common/migrations/0004_auto_20161117_1209.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

openedx/core/djangoapps/django_comment_common/migrations/0005_coursediscussionsettings.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 from opaque_keys.edx.django.models import CourseKeyField

openedx/core/djangoapps/django_comment_common/migrations/0006_coursediscussionsettings_discussions_id_map.py

 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.12 on 2018-04-23 21:09
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations
 import jsonfield.fields

openedx/core/djangoapps/django_comment_common/migrations/0007_discussionsidmapping.py

 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.13 on 2018-06-13 12:10
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations
 import jsonfield.fields

openedx/core/djangoapps/django_comment_common/migrations/0008_role_user_index.py

 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations