Allow to specify number of retries with an env variable

Rémy Coutablerequested to merge
allow-to-retry-with-an-env-variable into master

What does this MR do?

Allow to specify number of retries with an env variable

Simply set RETRIES=1 bin/rspec ... and the example will be retried once.

This can be useful when locally debugging examples that only pass on retries on the CI, without having to set CI=1, which has side-effects.

Edited by Rémy Coutable

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