Improve docker machine removal
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What does this MR do?
Improves docker machine removal
Retry each machine removal to up 3 times. After that allow performing one removal of all stuck machines (machine is tried to be removed more than 3 times), at most one machine per retry interval which is 30s.
This allows to greatly limit an amount of API failures when using docker+machine
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Why was this MR needed?
Are there points in the code the reviewer needs to double check?
Does this MR meet the acceptance criteria?
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Documentation created/updated - Tests
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Added for this feature/bug -
All builds are passing
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Branch has no merge conflicts with master
(if you do - rebase it please)
What are the relevant issue numbers?
Closes https://gitlab.com/gitlab-org/gitlab-ci-multi-runner/issues/2098