[EE] Retry the first login page validation
What does this MR do?
EE port of CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/29100
Does this MR meet the acceptance criteria?
Conformity
Edited by Mark Lapierre
EE port of CE MR: https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/29100