Wrong message received if you want to reset your password and the SMTP server isn't configured

Steps to reproduce:

1. Login with an Admin
2. Create a new user and add a valid email address for him
3. Make sure the SMTP server isn't configured: go to Administration -> Email and check that you have "127.0.0.1" in your Server field
4. Log off
5. Go to http://localhost:8080/xwiki/bin/view/XWiki/ResetPassword
6. Type in the name of the user from step 2
7. Click "Reset Password"

There is a message saying that "An e-mail was sent to ...", but if you check the email there's no message because there are no Email settings for the wiki. Instead of this message we should have something like: "Please configure your SMTP server and then try resetting your password again".