Revert "Switch certbot to the Ubuntu packages instead of the Git repo"

This reverts commit 019bf85ecc.

site-cookbooks/kosmos-parity/recipes/letsencrypt.rb

@@ -33,7 +33,8 @@ nginx_site "#{hostname}" do
 end
 
 execute "letsencrypt cert for #{hostname}" do
-  command "certbot certonly --webroot --agree-tos --email ops@5apps.com --webroot-path /var/www/#{hostname} -d #{hostname} -n"
+  command "./certbot-auto certonly --webroot --agree-tos --email ops@5apps.com --webroot-path /var/www/#{hostname} -d #{hostname} -n"
+  cwd "/usr/local/certbot"
   not_if { File.exist? "/etc/letsencrypt/live/#{hostname}/fullchain.pem" }
   notifies :reload, "service[nginx]", :delayed
 end