json cell: add timeout migration (#17920)

combo/data/migrations/0028_jsoncell_timeout.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('data', '0027_page_picture'),
+    ]
+
+    operations = [
+        migrations.AddField(
+            model_name='jsoncell',
+            name='timeout',
+            field=models.PositiveIntegerField(default=28, verbose_name='Request timeout'),
+        ),
+    ]