Built-in monitor for max number of failed responses allowed

[rennerocha]

Validate maximum amount of downloader/response_status_count/XXX for failed responses (4xx or 5xx responses) in general. Maybe have two configurations, one for client errors (4xx) and other for server errors (5xx).

If we want a more granular control (for example, set a threshold only for 503 errors), we already have UnwantedHTTPCodesMonitor

[shafiq-muhammad]

Hi @rennerocha I am looking into it. Thank you.