Refactor message generator

* Job object can now control the output and generate K:V output for
  notification types that can support it
* Notifications store the body as json/dict now to encode more
  information
* Notification Type can further compose the message based on what is
  sensible for the notification type
* This will also allow customizing the message template in the future
* All notification types use sane defaults for the level of detail now

awx/api/serializers.py

@@ -2118,7 +2118,7 @@ class NotificationSerializer(BaseSerializer):
     class Meta:
         model = Notification
         fields = ('*', '-name', '-description', 'notifier', 'error', 'status', 'notifications_sent',
-                  'notification_type', 'recipients', 'subject', 'body')
+                  'notification_type', 'recipients', 'subject')
 
     def get_related(self, obj):
         res = super(NotificationSerializer, self).get_related(obj)

awx/api/views.py

@@ -3053,7 +3053,8 @@ class NotifierTest(GenericAPIView):
 
     def post(self, request, *args, **kwargs):
         obj = self.get_object()
-        notification = obj.generate_notification("Tower Notification Test", "Ansible Tower Test Notification")
+        notification = obj.generate_notification("Tower Notification Test {}".format(obj.id),
+                                                 {"body": "Ansible Tower Test Notification {}".format(obj.id)})
         if not notification:
             return Response({}, status=status.HTTP_400_BAD_REQUEST)
         else: