Enable CIS Security Settings

Related-Prod: PROD-20755

Change-Id: I4630cc36cbf21e5a23f3728cfc1870b04cf17ac5
diff --git a/linux/system/single/simple.yml b/linux/system/single/simple.yml
index 5f21537..2b4e919 100644
--- a/linux/system/single/simple.yml
+++ b/linux/system/single/simple.yml
@@ -1,5 +1,6 @@
 classes:
 - service.linux.system
+- service.linux.system.cis
 - system.linux.system.banner
 - service.logrotate.server
 parameters: