display_name -> email_display_name

Signed-off-by: Yohann D'ANELLO <ynerant@crans.org>

roles/gitlab/templates/gitlab.rb.j2

@@ -103,7 +103,7 @@ gitlab_rails['time_zone'] = '{{ gitlab.time_zone }}'
 ##! If your SMTP server does not like the default 'From: gitlab@gitlab.example.com'
 ##! can change the 'From' with this setting.
 gitlab_rails['gitlab_email_from'] = '{{ gitlab.email }}'
-gitlab_rails['gitlab_email_display_name'] = '{{ gitlab.display_name }}'
+gitlab_rails['gitlab_email_display_name'] = '{{ gitlab.email_display_name }}'
 gitlab_rails['gitlab_email_reply_to'] = '{{ gitlab.email }}'
 # gitlab_rails['gitlab_email_subject_suffix'] = ''
 # gitlab_rails['gitlab_email_smime_enabled'] = false