RFR: Refactor gc+init logging

[Roman Kennke]

Am 31.07.2018 um 12:39 schrieb Aleksey Shipilev:
> http://cr.openjdk.java.net/~shade/shenandoah/gc-init-msg/webrev.01/
> 
> Let's make it more concise:
> 
> [0.002s][info][gc,init] Regions: 2560 x 4096K
> [0.002s][info][gc,init] Humongous object threshold: 4096K
> [0.002s][info][gc,init] Max TLAB size: 4096K
> [0.002s][info][gc,init] GC threads: 13 parallel, 13 concurrent
> [0.002s][info][gc,init] Reference processing: parallel
> [0.002s][info][gc,init] Shenandoah heuristics: adaptive
> [0.003s][info][gc,init] Safepointing mechanism: global-page poll
> 
> Testing: tier3_gc_shenandoah
> 
> Thanks,
> -Aleksey
> 

Sure, looks good! Thanks!
Roman