Update minio component with explanatory comment about hardcoded secrets
This MR is a follow-up on the following https://gitlab.com/gitlab-org/gitlab-qa/issues/436#note_239656266.
Edited by George Koltsov
Do not update/delete: Banner broadcast message test data
Do not update/delete: Notification broadcast message test data
This MR is a follow-up on the following https://gitlab.com/gitlab-org/gitlab-qa/issues/436#note_239656266.