Any step can set the number of times it should be attempted by attaching an
attempts parameter with the number of times it should be tried.
Attempts will retry on a Concourse error as well as build failure.
The total number of times a step should be tried should it fail, e.g.
5 will try the step up to 5 times before giving up.
When the number of attempts is reached and the step has still not succeeded then the step will fail.
Retrying a Task
The following will run the task, and retry it 9 times (for a total of 10 attempts) if it fails:
plan: - get: foo - task: unit file: foo/unit.yml attempts: 10