This commit reconfigures the importer script

• Tests can now be executed from the importer
• All jobs run fine and produce correct results

core/migrations/0001_initial.py

 # Generated by Django 2.0.1 on 2018-01-10 10:46
 
-import core.models
-from django.conf import settings
+import uuid
+
 import django.contrib.auth.models
 import django.contrib.auth.validators
-from django.db import migrations, models
 import django.db.models.deletion
 import django.utils.timezone
-import uuid
+from django.conf import settings
+from django.db import migrations, models
+
+import core.models
 
 
 class Migration(migrations.Migration):