SeAT Manager (#704)

* SeAT service in modular service app format

* Replace string concatenation with formatters

* Fix incorrect references to user

* Fix exception when user doesn't have seat active

* Prevent deletion of seat API keys by default

* Improve api response error handling

* Corrected notification message

* Added missing view returns

* Update SeAT to use permissions based access

* Update password generator to new style

* Correct logging message

* Fix seat role update tasks

* Correct validate user logic

* Add seat test settings

* Added basic seat unit tests

* Added add permissions function from other branch

* Remove obsolete settings references

services/modules/seat/migrations/0002_service_permissions.py

@@ -0,0 +1,19 @@
+# -*- coding: utf-8 -*-
+# Generated by Django 1.10.5 on 2017-02-02 10:49
+from __future__ import unicode_literals
+
+from django.db import migrations
+
+
+class Migration(migrations.Migration):
+
+    dependencies = [
+        ('seat', '0001_initial'),
+    ]
+
+    operations = [
+        migrations.AlterModelOptions(
+            name='seatuser',
+            options={'permissions': (('access_seat', 'Can access the SeAT service'),)},
+        ),
+    ]