Move some jenkins vars to default

Bug-related: PROD-27309 (PROD:27309)

Change-Id: Id295144d8b66725920b1871eb54d956db07c632e
diff --git a/defaults/init.yml b/defaults/init.yml
index 6c30995..ef1fe8c 100644
--- a/defaults/init.yml
+++ b/defaults/init.yml
@@ -9,6 +9,7 @@
 - system.defaults.linux_system_repo
 - system.defaults.linux_system_file
 - system.defaults.git
+- system.defaults.jenkins
 - system.defaults.maas
 - system.defaults.openstack
 - system.defaults.galera