Merge pull request #1131 from sul-dlss/set-env-to-prod-for-stage-deploy

Stick to our standard of production env in deployments

config/deploy/stage.rb

@@ -1,5 +1,5 @@
 server 'sul-purl-stage.stanford.edu', user: 'purl', roles: %w(web db app)
 
 Capistrano::OneTimeKey.generate_one_time_key!
-set :rails_env, 'development'
+set :rails_env, 'production'
 set :bundle_without, %w{deployment test}.join(' ')