added certbot section

templates/certbot/get_cert.erb

@@ -0,0 +1,2 @@
+certbot certonly -t -n --agree-tos --webroot -w <%= @ng_certbot_cert_path %>/ -d <%= @ng_nagios_server %> --email <%= @ng_mail_user %>
+touch /etc/httpd/conf.d/.cert_created

templates/certbot/unless_get_cert.erb

@@ -0,0 +1,4 @@
+#!/bin/bash 
+<% if @ng_enable_certbot == true %>
+test -d /etc/letsencrypt/archive/<%= @ng_nagios_server %>
+<% end %>