RFR (S): 8051973: Eager reclaim leaves marks of marked but reclaimed objects on the next bitmap

[Thomas Schatzl]

Hi all,

  can I have reviews for the following small change?

JDK-8027959 implemented eager reclaim of humongous objects, which
potentially left stray set marks on the mark bitmap after reclaiming a
region.

This change fixes this.

CR:
https://bugs.openjdk.java.net/browse/JDK-8051973
Webrev:
http://cr.openjdk.java.net/~tschatzl/8051973/webrev/
Testing:
jprt, failing test case, new jtreg test case

Thanks,
  Thomas