Fix bug for distribute search: In getSummaryResult, if any of workers failed, such error should be reflected to master/aggregator, or else, corruption happened in SearchMerger::getSummaryResult
Fix bug for distribute search:
In getSummaryResult, if any of workers failed, such error should be
reflected to master/aggregator, or else, corruption happened in
SearchMerger::getSummaryResult

izenecloud/sf1r-ad-delivery,pombredanne/sf1r-lite,izenecloud/sf1r-ad-delivery,izenecloud/sf1r-ad-delivery,pombredanne/sf1r-lite,izenecloud/sf1r-lite,izenecloud/sf1r-lite,pombredanne/sf1r-lite,pombredanne/sf1r-lite,izenecloud/sf1r-lite,pombredanne/sf1r-lite,izenecloud/sf1r-lite,izenecloud/sf1r-lite,izenecloud/sf1r-ad-delivery,izenecloud/sf1r-ad-delivery