do not intercept and change anything in test env

Author: Neeraj Singh

lib/mail_interceptor.rb

@@ -39,6 +39,7 @@ def normalize_recipients recipients
 
     def add_subject_prefix message
       return if subject_prefix.blank?
+      return if !env.intercept?
 
       message.subject = "#{subject_prefix} #{message.subject}"
     end
@@ -69,6 +70,8 @@ def name
     end
 
     def intercept?
+      return false if Rails.env.test?
+
       !Rails.env.production?
     end
   end