rhubarbe bye fails to turn off macphones when run from github

[parmentelat]

we have a github action that does ssh inria_gitlabrunner@faraday.inria.fr rhubarbe bye

and that fails to talk to the macphones, complaining about a host key issue

[parmentelat]

the funny thing is this does not happen if the same command

• is run directly from faraday
• or is run through ssh from an inria laptop

[parmentelat]

an attempt to fix this is in 25371e99fcedb27b6f93eff93d383a8416fc8137

however the only way to test is to publish..