Don't send test email asynchronously.

git-svn-id: svn+ssh://rubyforge.org/var/svn/redmine/trunk@9583 e93f8b46-1217-0410-a6f0-8f06a7374b81

lib/tasks/email.rake

@@ -176,7 +176,9 @@ END_DESC
 
       ActionMailer::Base.raise_delivery_errors = true
       begin
-        Mailer.deliver_test_email(user)
+        Mailer.with_synched_deliveries do
+          Mailer.deliver_test_email(user)
+        end
         puts l(:notice_email_sent, user.mail)
       rescue Exception => e
         abort l(:notice_email_error, e.message)