Update Celery config to use UTC time (#2080)

* Add a retry mechanism when fetching email attachements

* Remove unnecessary exception handling specificity

* Revert bad commit

* Enable/use UTC not local time in celery and beat conf

* Fix bad commit...

app/celery/celery.py

@@ -48,6 +48,7 @@ def init_app(self, app):
                 "beat_schedule": app.config["CELERYBEAT_SCHEDULE"],
                 "imports": app.config["CELERY_IMPORTS"],
                 "task_serializer": app.config["CELERY_TASK_SERIALIZER"],
+                "enable_utc": app.config["CELERY_ENABLE_UTC"],
                 "timezone": app.config["CELERY_TIMEZONE"],
                 "broker_transport_options": app.config["BROKER_TRANSPORT_OPTIONS"],
                 "task_queues": app.config["CELERY_QUEUES"],

app/config.py

@@ -359,7 +359,7 @@ class Config(object):
         "queue_name_prefix": NOTIFICATION_QUEUE_PREFIX,
     }
     CELERY_ENABLE_UTC = True
-    CELERY_TIMEZONE = os.getenv("TIMEZONE", "America/Toronto")
+    CELERY_TIMEZONE = os.getenv("TIMEZONE", "UTC")
     CELERY_ACCEPT_CONTENT = ["json"]
     CELERY_TASK_SERIALIZER = "json"
     CELERY_IMPORTS = (