Change services.id to a UUID

Ideally all the primary keys in the db would be UUID in order to guarantee unique ids across distributed dbs.
This updates the services.id to a UUID. All the tables with a foreign key to the services.id are also updated.
The endpoints no longer state a data type of the <service_id> path param.
All the tests are updated to reflect this update.

The thing to pay attention to is the 0011_uuid_service_id.py migration script.
This commit must go with a commit on the notifications_admin app to keep things working.
There will be a small outage until both deploys have happened.

app/notifications/rest.py

@@ -136,11 +136,11 @@ def validate_required_and_something(json_body, field):
 
 def _add_notification_to_queue(template_id, service, msg_type, to):
     q = boto3.resource('sqs', region_name=current_app.config['AWS_REGION']).create_queue(
-        QueueName=str(service.queue_name))
+        QueueName=str(service.id))
     import uuid
     message_id = str(uuid.uuid4())
     notification = json.dumps({'message_id': message_id,
-                               'service_id': service.id,
+                               'service_id': str(service.id),
                                'to': to,
                                'message_type': msg_type,
                                'template_id': template_id})