8164124: [BACKOUT] G1 does not implement millis_since_last_gc which is needed by RMI GC
Reviewed-by: jprovino

8071770: 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: jmasa, tschatzl

8156022: Add prediction for cost_per_byte_ms to G1Analytics
Reviewed-by: sjohanss, mgerdin

8151711: Move G1 number sequences out of the G1 collector policy
Reviewed-by: tbenson, ehelin