Fix Login -> Username in LDAP sign-in form
Little mistake I did when merging CE->EE, Login
should be Username
(see the CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6947/diffs#c2bdcb101cb41d9cda1c4d451e9323a0dc694be2_4_3)
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
Little mistake I did when merging CE->EE, Login
should be Username
(see the CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6947/diffs#c2bdcb101cb41d9cda1c4d451e9323a0dc694be2_4_3)