Rename signing key for doorkeeper-openid_connect
This MR renames the secret key for doorkeeper-openid_connect
, to make it clearer what it's used for.
Needs to be coordinated with https://gitlab.com/gitlab-org/gitlab-ce/merge_requests/14372
The reason for renaming the secret was https://gitlab.com/gitlab-com/infrastructure/issues/2259
Edited by GitLab Release Tools Bot