Add new gpg key for RHEL repos

[tuxmea]

see:

• https://packages.gitlab.com/gitlab/gitlab-ee/install#manual-rpm
• https://packages.gitlab.com/gitlab/gitlab-ce/install#manual-rpm

[mojibake-umd]

Ha! Beat me to it.
I discovered yesterday, but did not have time.
For anyone in a pinch can set in hiera for a quick workaround

gitlab::repository_configuration:
  yumrepo:
    "gitlab_official_ce":
      gpgkey: "https://packages.gitlab.com/gitlab/gitlab-ce/gpgkey https://packages.gitlab.com/gitlab/gitlab-ce/gpgkey/gitlab-gitlab-ce-3D645A26AB9FBD22.pub.gpg https://packages.gitlab.com/gitlab/gitlab-ce/gpgkey/gitlab-gitlab-ce-CB947AD886C8E8FD.pub.gpg"