Add backup 10.0 and 10.1 RMs

Merged username-removed-443319 requested to merge add-backup-rms into master

This is just so that if someone is out, and we need someone else in that timezone, we have a first port of call. As all of the RMs for these releases are fully-trained, I don't expect that we'll need them.


/cc @rspeicher @felipe_artur @godfat @jarka @stanhu

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