style(workers): add in line

there should be two lines between functions and other code

Issue: https://www.pivotaltracker.com/story/show/b144646649n

- [ ] It works!
- [ ] Comments provide sufficient explanations for the next contributor
- [ ] Tests cover changes and corner cases
- [ ] Follows Quay syntax patterns and format

workers/notificationworker.py

@@ -11,6 +11,7 @@ from data.model import InvalidNotificationException
 
 logger = logging.getLogger(__name__)
 
+
 class NotificationWorker(QueueWorker):
   def process_queue_item(self, job_details):
     notification_uuid = job_details['notification_uuid']

workers/queueworker.py

@@ -23,6 +23,7 @@ class WorkerUnhealthyException(Exception):
       queue along with another retry. """
   pass
 
+
 class QueueWorker(Worker):
   def __init__(self, queue, poll_period_seconds=30, reservation_seconds=300,
                watchdog_period_seconds=60, retry_after_seconds=300):