Fix flake8 error

datacenterlight/cms_models.py

@@ -354,7 +354,7 @@ class DCLCalculatorPluginModel(CMSPlugin):
                   "in the backend to be automatically listed in this "
                   "calculator instance."
     )
-    default_selected_template=models.CharField(
+    default_selected_template = models.CharField(
         default="Devuan Ascii",
         null=True,
         max_length=128,

datacenterlight/migrations/0026_dclcalculatorpluginmodel_default_selected_template.py

@@ -1,5 +1,5 @@
 # -*- coding: utf-8 -*-
-# Generated by Django 1.9.4 on 2018-09-27 20:15
+# Generated by Django 1.9.4 on 2018-09-27 20:32
 from __future__ import unicode_literals
 
 from django.db import migrations, models