GRN2-125: Added a configurable reCAPTCHA on sign up (#502)

* Added a configurable reCAPTCHA on sign up

* Added missing code

config/application.rb

@@ -108,5 +108,8 @@ module Greenlight
 
     # Number of rows to display per page
     config.pagination_rows = ENV['NUMBER_OF_ROWS'].to_i.zero? ? 10 : ENV['NUMBER_OF_ROWS'].to_i
+
+    # Whether the user has defined the variables required for recaptcha
+    config.recaptcha_enabled = ENV['RECAPTCHA_SITE_KEY'].present? && ENV['RECAPTCHA_SECRET_KEY'].present?
   end
 end

config/locales/en.yml

@@ -210,6 +210,10 @@ en:
     google: Google
     microsoft_office365: Office 365
     twitter: Twitter
+  recaptcha:
+    errors:
+      recaptcha_unreachable: Oops, we failed to validate your reCAPTCHA response. Please try again.
+      verification_failed: reCAPTCHA verification failed, please try again.
   recording:
     all_recordings: All Recordings
     email: Email Recording