Rewrite Notification subsystem

In this commit:
 - delete a lot of really bad and / or unused code
 - redesign a much simpler Notification model
 - create and send notifications to the user's inbox on booking start & end
 - migrations
 - emails user when booking is ready and when it ends

Not in this commit:
 - Creating notifications from lab messages
 - warning messages when a booking is about to end
 - creating "summary" notifications when e.g. a booking has been fulfilled by a lab

Change-Id: I69b4dc36c3f2bce76d810106baadeef5a562cc7d
Signed-off-by: Parker Berberian <pberberian@iol.unh.edu>

1 files changed, 2 insertions, 7 deletions

diff --git a/src/dashboard/tasks.py b/src/dashboard/tasks.py
index 48008b6..c619642 100644
--- a/src/dashboard/tasks.py
+++ b/src/dashboard/tasks.py
@@ -13,18 +13,12 @@ from celery import shared_task
 from django.utils import timezone
 from django.db.models import Q
 from booking.models import Booking
-from notifier.manager import *
-from notifier.models import *
+from notifier.manager import NotificationHandler
 from api.models import *
 from resource_inventory.resource_manager import ResourceManager
 
 
 @shared_task
-def conjure_aggregate_notifiers():
-    NotifyPeriodic.task()
-
-
-@shared_task
 def booking_poll():
     def cleanup_hardware(qs):
         for hostrelation in qs:
@@ -86,6 +80,7 @@ def booking_poll():
             cleanup_access(AccessRelation.objects.filter(job=job))
             job.complete = True
             job.save()
+            NotificationHandler.notify_booking_end(booking)
 
 
 @shared_task