We are only changing the Jepsen_config_fuzzer* suites because the issue exist in only FCBIS because of two reasons:

1. single $backupCursor open at a time limitations which cause nodes waiting for other nodes to finish their sync first while they keep failing.
2. Opening $backupCursor was failing when only one oplog exist because we were hitting this issue. (see this comment for logs)
   "Oplog rolled over while establishing the backup cursor", Which got removed in master, but exist in 8.0-.