RFR: 8171235: Move archive object code from G1MarkSweep into G1ArchiveAllocator

[Stefan Johansson]

Hi,

Please review this re-factoring:
https://bugs.openjdk.java.net/browse/JDK-8171235

Webrev:
http://cr.openjdk.java.net/~sjohanss/8171235/hotspot.00/

Summary:
This change moves the code checking if an object or region is associated 
with the archive allocator from G1MarkSweep to G1ArchiveAllocator 
itself. It makes more sense to keep all code for archive handling in one 
class instead of spreading out the logic in more places.

Testing:
* JPRT
* RBT tier2 + tier3

Thanks,
Stefan