RFR (XS): JDK-8040977: G1 crashes when run with -XX:-G1DeferredRSUpdate

[Thomas Schatzl]

Hi all,

  can I have reviews for this change? It fixes wrong order of
declaration of members of G1ParScanThreadState that causes crashes when
G1DeferredRSUpdate is disabled.

The change is based on the changes for 8035400 and8035401 posted recently.

CR:
https://bugs.openjdk.java.net/browse/JDK-8040977

Webrev:
http://cr.openjdk.java.net/~tschatzl/8040977/webrev/

Testing:
jprt, new jtreg test case

Thanks,
  Thomas