ubuntu cluster utils.sh verify-ssh-prereqs

[MCyprien]

PR for #8559

[googlebot]

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[resouer]

@MCyprien Thanks, we'd like to give it a review, but please fix your cla first :)

[k8s-bot]

Can one of the admins verify that this patch is reasonable to test? (reply "ok to test", or if you trust the user, reply "add to whitelist")

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[MCyprien]

ok I signed the CLA, I think

[googlebot]

We found a Contributor License Agreement for you (the sender of this pull request), but were unable to find agreements for the commit author(s). If you authored these, maybe you used a different email address in the git commits than was used to sign the CLA (login here to double check)? If these were authored by someone else, then they will need to sign a CLA as well, and confirm that they're okay with these being contributed to Google.

[MCyprien]

what about now my sweet googlebot? i signed it again

[dchen1107]

LGTM. Oncall will pick it up and merge it based on our e2e test result. We ran into some issues with our Jenkin e2e tests lately, and tried to control the merge rate a little bit.