Install certbot from the direct download when on 15.04

It does not have a ppa release. Add a cron job for renewal. When using
the PPA a Systemd timer is part of the package

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

@@ -9,11 +9,25 @@
 
 # Install certbot and set up hooks
 
+# Remove the unless/else when we get rid of dev, running 15.04. No ppa for it
+unless node["lsb"]["codename"] == "vivid"
   apt_repository "certbot" do
     uri "ppa:certbot/certbot"
   end
 
   package "certbot"
+else
+  remote_file "/usr/bin/certbot" do
+    source "https://dl.eff.org/certbot-auto"
+    mode 0755
+  end
+
+  cron "renew Let's Encrypt certificates" do
+   hour "4"
+   mailto "logs@5apps.com"
+   command "/usr/bin/certbot -q renew"
+ end
+end
 
 directory "/etc/letsencrypt/renewal-hooks" do
   recursive true