[14] RFR 8242400: Shenandoah: Restore logging to pre-jdk8241984 format

[Zhengyu Gu]

Looks good.

-Zhengyu

On 5/18/20 1:27 PM, Aleksey Shipilev wrote:
> Original RFE:
>    https://bugs.openjdk.java.net/browse/JDK-8242400
>    https://hg.openjdk.java.net/jdk/jdk/rev/7992ff451fec
> 
> Missing GCTraceConcTimeImpl -> GCTraceConcTime rename in 14u yields the conflict. Trivially resolved
> by changing it back.
> 
> 14u webrev:
>    https://cr.openjdk.java.net/~shade/8242400/webrev.14u.01/
> 
> Testing: hotspot_gc_shenandoah {fastdebug,release}, tier{1,2} with Shenandoah
>