Fix secrets task on first deployments

New CONSUL instances who didn't use the newest installer and haven't
done any deployments with capistrano would get an exception because the
`current` capistrano folder doesn't exist yet.

config/deploy.rb

@@ -138,6 +138,7 @@ end
 
 task :smtp_ssl_and_delay_jobs_secrets do
   on roles(:app) do
+    if test("[ -d #{current_path} ]")
       within current_path do
         with rails_env: fetch(:rails_env) do
           tasks_file_path = "lib/tasks/secrets.rake"
@@ -161,3 +162,4 @@ task :smtp_ssl_and_delay_jobs_secrets do
       end
     end
   end
+end