fix: thundering hurd (#435)

- started all puppet clients at the same time, resulting in thundering herd
- add a randomness timer of 10 minutes

Reviewed-on: #435

site/profiles/templates/puppet/client/puppet.conf.erb

@@ -12,3 +12,5 @@ runtimeout = <%= @runtimeout %>
 show_diff = <%= @show_diff %>
 usecacheonfailure = <%= @usecacheonfailure %>
 number_of_facts_soft_limit = <%= @facts_soft_limit %>
+splay = <%= @splay %>
+splaylimit = <%= @splaylimit %>