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/admin.py

@@ -0,0 +1,10 @@
+from __future__ import unicode_literals
+from django.contrib import admin
+from .models import SeatUser
+
+
+class SeatUserAdmin(admin.ModelAdmin):
+    list_display = ('user', 'username')
+    search_fields = ('user__username', 'username')
+
+admin.site.register(SeatUser, SeatUserAdmin)