jenkins: test jenkins in a loop

[maxime-desroches]

Current results for 20 builds:

"onroad" : 0% failure rate
"tici-hardware" : 10% failure rate
"loopback" : 0% failure rate
"AR0231" : 0% failure rate
"LSM + MMC" : 0% failure rate
"model-replay" : 5% failure rate
"tizi" : 50% failure rate
"BMX + LSM" : 0% failure rate
"OX03C10" : 0% failure rate

[adeebshihadeh]

It's probably easier to use the Jenkins API rather than make fake commits.

[github-actions]

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[github-actions]

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