it is better for fetchItemQueues to select items from greater queues first
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                 Key: NUTCH-1297
                 URL: https://issues.apache.org/jira/browse/NUTCH-1297
             Project: Nutch
          Issue Type: Improvement
          Components: fetcher
    Affects Versions: 1.4
            Reporter: behnam nikbakht


there is a situation that if we have multiple hosts in fetch, and size of hosts 
were different, large hosts have a long delay until the getFetchItem() in 
FetchItemQueues class select a url from them, so we can give them more priority.
for example if we have 10 url from host1 and 1000 url from host2, and have 5 
threads, if all threads first selected from host1, we had more delay on fetch 
rather than a situation that threads first selected from host2, and when host 2 
was busy, then selected from host1.

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