Tune configuration times

[JulianVentura]

1. Aggregator should hold tasks for longer, to give operators opportunity to revive. Current is set at 100 seconds.
2. Operator should try to send a task response many more times to aggregator. Current is set at 10 retries, waiting 10 seconds between them.
3. Explorer should check for more than 8 blocks, so no batches are missed.