Double number of concurrent celery workers (#1947)

Co-authored-by: Steve Astels <[email protected]>

scripts/run_celery.sh

@@ -4,4 +4,4 @@ set -e
 
 echo "Start celery"
 
-celery -A run_celery.notify_celery worker --pidfile="/tmp/celery.pid" --loglevel=INFO --concurrency=4 -Q database-tasks,-priority-database-tasks.fifo,-normal-database-tasks,-bulk-database-tasks,job-tasks,notify-internal-tasks,periodic-tasks,priority-tasks,normal-tasks,bulk-tasks,reporting-tasks,research-mode-tasks,retry-tasks,send-sms-tasks,send-email-tasks,service-callbacks,delivery-receipts
+celery -A run_celery.notify_celery worker --pidfile="/tmp/celery.pid" --loglevel=INFO --concurrency=8 -Q database-tasks,-priority-database-tasks.fifo,-normal-database-tasks,-bulk-database-tasks,job-tasks,notify-internal-tasks,periodic-tasks,priority-tasks,normal-tasks,bulk-tasks,reporting-tasks,research-mode-tasks,retry-tasks,send-sms-tasks,send-email-tasks,service-callbacks,delivery-receipts