Initialize Redis pool in single-threaded context
Ensure single-threaded execution and delete thread-safe code.
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/21598 Closes https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6212
Ensure single-threaded execution and delete thread-safe code.
Closes https://gitlab.com/gitlab-org/gitlab-ce/issues/21598 Closes https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/6212