7095243: Disambiguate ReferenceProcessor::_discoveredSoftRefs Summary: Add a new, separate, pointer to the base of the array of discovered reference lists and use this new pointer in places where we iterate over the entire array. Reviewed-by: ysr, brutisso

7088680: G1: Cleanup in the G1CollectorPolicy class Summary: Removed unused fields and methods, removed the G1CollectoryPolicy_BestRegionsFirst class and folded its functionality into the G1CollectorPolicy class. Reviewed-by: ysr, brutisso, jcoomes