BaseCollector: Fixing retrieve_uri method
BaseCollector: Fixing retrieve_uri method

Trying to retrieve URL only if HTTP error is >= 499 and added
max retries to 10.

olhoneles/olhoneles,olhoneles/olhoneles,gamnor/olhoneles,gamnor/olhoneles,gamnor/olhoneles,olhoneles/olhoneles