Corrected HTML template for mailer

www.agileplannerapp.com/boards/173808/cards/5250

the notification to suspended users trying to reset
their password was missing some HTML formatting.

also, changed the Devise::Recoverable overridden
send_reset_password_instructions method to return
the user in each case, because the controller
expects that.
Merge pull request #285 from alphagov/send-reset-password-email-updates

Corrected HTML template for mailer