8164482: [REDO] G1 does not implement millis_since_last_gc which is needed by RMI GC
Summary: G1 does not return a correct value for the CollectedHeap::millis_since_last_gc()
Reviewed-by: tschatzl, kbarrett

8164936: G1 age table printout contains contents from previous GC
Summary: Split tenuring threshold update and printing into two separate parts so that they can be used independently.
Reviewed-by: jmasa, sangheki

8155634: Clean out old logging and dead code from SurvRateGroup
Reviewed-by: jmasa, tschatzl, sjohanss

8150721: Don't explicitly manage G1 young regions in YoungList
Reviewed-by: ehelin, sjohanss, tschatzl

8155209: Move setting of young index in cset to G1CollectionSet
Reviewed-by: sjohanss, ehelin

8155082: Refactor mutator region restriction
Reviewed-by: mgerdin, tschatzl

8155224: Bring back version control history to g1Policy.hpp and g1DefaultPolicy.*
Reviewed-by: pliden, mgerdin, sjohanss

8154753: Turn G1Policy into an interface
Reviewed-by: sjohanss, mgerdin

8154752: Cleanup initialization of G1Policy
Reviewed-by: ehelin, tschatzl

8154467: Cleanup initialization of GCPolicyCounters
Reviewed-by: ehelin, sjohanss

8154154: Separate G1 specific policy code from the CollectorPolicy class hierarchy
Summary: Move G1 runtime policy code to new class G1Policy which is unrelated to CollectorPolicy
Reviewed-by: kbarrett, ehelin