Finish porting the workers over to apscheduler 3.0

app.py

@@ -17,7 +17,6 @@ from data.users import UserAuthentication
 from util.analytics import Analytics
 from util.exceptionlog import Sentry
 from util.queuemetrics import QueueMetrics
-from util.expiration import Expiration
 from data.billing import Billing
 from data.buildlogs import BuildLogs
 from data.queue import WorkQueue
@@ -52,7 +51,10 @@ else:
   app.config.update(environ_config)
 
   logger.debug('Applying license config from: %s', LICENSE_FILENAME)
-  app.config.update(load_license(LICENSE_FILENAME))
+  try:
+    app.config.update(load_license(LICENSE_FILENAME))
+  except IOError:
+    raise RuntimeError('No license file found, please check your configuration')
 
   if app.config.get('LICENSE_EXPIRATION', datetime.min) < datetime.utcnow():
     raise RuntimeError('License has expired, please contact support@quay.io')
@@ -71,7 +73,6 @@ sentry = Sentry(app)
 build_logs = BuildLogs(app)
 queue_metrics = QueueMetrics(app)
 authentication = UserAuthentication(app)
-# expiration = Expiration(app)
 userevents = UserEventsBuilderModule(app)
 
 tf = app.config['DB_TRANSACTION_FACTORY']