RFR: 8214946: G1: Initialize all class members on construction

[Kim Barrett]

> On Dec 7, 2018, at 10:02 AM, Leo Korinth <leo.korinth at oracle.com> wrote:
> 
> Hi,
> 
> This patch initializes all class members on construction in the g1 folder.
> 
> Enhancement:
> https://bugs.openjdk.java.net/browse/JDK-8214946
> 
> Webrev:
> http://cr.openjdk.java.net/~lkorinth/8214946/00
> 
> Testing:
> running tier1-tier3
> 
> Thanks,
> Leo

Looks good.