add cronjob to run management command

Like other cron job, the idea here is that we dont want to overwhelm
the resources so the cron jobs will run everyhour for a small
number of applications

Author: superryeti

deploy/production/etc/cron.d/physionet

@@ -16,3 +16,6 @@
 
 # auto reject pending credentialing applications in case the references don't respond
 0 */1 * * *  www-data  env DJANGO_SETTINGS_MODULE=physionet.settings.production /physionet/python-env/physionet/bin/python3 /physionet/physionet-build/physionet-django/manage.py reject_pending_credentialing_applications
+
+# auto reject pending registration applications for events after the event end date
+0 */1 * * *  www-data  env DJANGO_SETTINGS_MODULE=physionet.settings.production /physionet/python-env/physionet/bin/python3 /physionet/physionet-build/physionet-django/manage.py reject_past_event_applications

deploy/staging/etc/cron.d/physionet

@@ -16,3 +16,6 @@
 
 # auto reject pending credentialing applications in case the references don't respond
 0 */1 * * *  www-data  env DJANGO_SETTINGS_MODULE=physionet.settings.staging /physionet/python-env/physionet/bin/python3 /physionet/physionet-build/physionet-django/manage.py reject_pending_credentialing_applications
+
+# auto reject pending registration applications for events after the event end date
+0 */1 * * *  www-data  env DJANGO_SETTINGS_MODULE=physionet.settings.production /physionet/python-env/physionet/bin/python3 /physionet/physionet-build/physionet-django/manage.py reject_past_event_applications