Change queue permission_name from 50 chars to 72 chars (#484)

* Change queue permission_name from 50 chars to 72 chars to accomodate slug + prepended text, to resolve #483

helpdesk/migrations/0015_expand_permission_name_size.py

@@ -0,0 +1,20 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-02-10 19:27
+from __future__ import unicode_literals
+
+from django.db import migrations, models
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('helpdesk', '0014_usersettings_related_name'),
+    ]
+
+    operations = [
+        migrations.AlterField(
+            model_name='queue',
+            name='permission_name',
+            field=models.CharField(blank=True, editable=False, help_text='Name used in the django.contrib.auth permission system', max_length=72, null=True, verbose_name='Django auth permission name'),
+        ),
+    ]

helpdesk/models.py

@@ -180,7 +180,7 @@ class Queue(models.Model):
 
     permission_name = models.CharField(
         _('Django auth permission name'),
-        max_length=50,
+        max_length=72,  # based on prepare_permission_name() pre-pending chars to slug
         blank=True,
         null=True,
         editable=False,