RFR: Move Verifier "start" message under (gc,start)

[Zhengyu Gu]

Good.

-Zhengyu

On 08/06/2017 04:02 PM, Aleksey Shipilev wrote:
> This unclutters the GC log a bit:
>   http://cr.openjdk.java.net/~shade/shenandoah/verifier-start-msg/webrev.01/
>
> Sample log:
>
> [9.484s][info][gc] GC(4) Verify Before Mark, Level 4 (1297209 reachable, 0 marked)
> [9.485s][info][gc] GC(4) Pause Init Mark 135.297ms
> [9.609s][info][gc] GC(4) Concurrent marking 539M->640M(876M) 124.407ms
> [9.609s][info][gc] GC(4) Concurrent precleaning 640M->640M(876M) 0.118ms
> [9.826s][info][gc] GC(4) Verify After Mark, Level 4 (1536381 reachable, 1280120 marked)
> [9.830s][info][gc] GC(4) Pause Final Mark 640M->625M(876M) 220.602ms
> [9.912s][info][gc] GC(4) Concurrent evacuation  625M->747M(876M) 82.028ms
> [9.912s][info][gc] GC(4) Concurrent reset bitmaps 747M->747M(876M) 0.171ms
>
>
> Thanks,
> -Aleksey
>