updated rail-credentials reference to an env-variable reference

Author: don-stuckey

config/initializers/recaptcha.rb

@@ -5,7 +5,7 @@
 # the keys are set in config/credentials.yml.env
 
 Recaptcha.configure do |config|
-  config.site_key = Rails.application.credentials.recaptcha[:site_key]
-  config.secret_key = Rails.application.credentials.recaptcha[:secret_key]
+  config.site_key = ENV["RECAPTCHA_SITE_KEY"]
+  config.secret_key = ENV["RECAPTCHA_SECRET_KEY"]
   config.proxy = 'http://someproxy.com:port'
 end