Adds migration for simulate publish command

A rewording of help text caused django to create
a new migration for config model and that was not
initially pushed to master.

openedx/core/djangoapps/content/course_overviews/migrations/0017_auto_20191002_0823.py

+# -*- coding: utf-8 -*-
+# Generated by Django 1.11.24 on 2019-10-02 08:23
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('course_overviews', '0016_simulatecoursepublishconfig'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='simulatecoursepublishconfig',
+            name='arguments',
+            field=models.TextField(blank=True, default=b'', help_text=b'Useful for manually running a Jenkins job. Specify like "--delay 10 --receivers A B C         --courses X Y Z".'),
+        ),
+    ]