Fixing python-modernize issues.

common/djangoapps/third_party_auth/migrations/0001_initial.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 import django.db.models.deletion
 import provider.utils

common/djangoapps/third_party_auth/migrations/0005_add_site_field.py

@@ -1,5 +1,5 @@
 # -*- 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

common/djangoapps/third_party_auth/migrations/0006_samlproviderconfig_automatic_refresh_enabled.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

common/djangoapps/third_party_auth/migrations/0007_auto_20170406_0912.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

common/djangoapps/third_party_auth/migrations/0008_auto_20170413_1455.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

common/djangoapps/third_party_auth/migrations/0010_add_skip_hinted_login_dialog_field.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

common/djangoapps/third_party_auth/migrations/0013_sync_learner_profile_data.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

common/djangoapps/third_party_auth/migrations/0021_sso_id_verification.py

@@ -1,6 +1,6 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.12 on 2018-04-11 15:33
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
 from django.db import migrations, models
 

common/djangoapps/third_party_auth/migrations/0023_auto_20190418_2033.py

@@ -1,9 +1,9 @@
 # -*- coding: utf-8 -*-
 # Generated by Django 1.11.20 on 2019-04-18 20:33
-from __future__ import unicode_literals
+from __future__ import absolute_import, unicode_literals
 
-from django.db import migrations, models
 import django.db.models.deletion
+from django.db import migrations, models
 
 
 class Migration(migrations.Migration):