Automatically rescheduled merge_requests from 11.7 to milestone 11.9

The following were rescheduled because the previous milestone was already closed:

• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/9438 Add checks to prevent cycling hierarchy ~"Accepting merge requests", ~"P2", ~"Plan", ~"bug", regression:11.7
• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8977 Add hide dismissed filter for security dashboard Deliverable, GitLab Ultimate, ~"In dev", ~"Secure", ~"UX ready", backend, ~"devops:secure", direction, feature, frontend, release post item, security dashboard
• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8942 Adding wait to address slowness while fetching content of page Quality
• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8915 WIP: Glavin001 Feature - Allow filtering MRs by Approver ~"Create", Deliverable, ~"P2", ~"S4", auto updated, backend, blocked, frontend, usability
• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8877 WIP: Upgrade to rails 5.2 rails5.2
• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/8324 Geo: Move push to secondary (SSH) logic from Rails into workhorse ~"Geo", ~"Geo Performance", blocked
• https://gitlab.com/gitlab-org/gitlab-ee/merge_requests/5190 WIP: Port of [Rails5] Add ApplicationRecord Community contribution, Quality, auto updated, awaiting feedback, backend, ~"dependency update", rails5

Please reschedule accordingly if they're wrong.