Fix variable name

conf/archivist.cron

@@ -1 +1 @@
-__CRON_FREQUENCY__ root nice -n10 __INSTALL_DIR__/archivist.sh | tee -a /var/log/__APP__/__APP__.log 2>&1
+__FREQUENCY_CRON__ root nice -n10 __INSTALL_DIR__/archivist.sh | tee -a /var/log/__APP__/__APP__.log 2>&1