Do not retry any test if total failures have exceeded a certain limit

[vkarak]

This is essentially a variation of the --max-retries option where the tests will be retried only if the total number of failures is below a certain threshold. This is different from the --maxfail option which will stop the session once the total number of failures is reached. This request would run all the tests once and will eventually decide whether it is worth retrying them or not.