RFR (S): 8006088: Incompatible heap size flags accepted by VM

[Thomas Schatzl]

Hi all,

  please review the latest changes for this CR, taking jtreg naming
conventions into account.

Differences:
 - moved tests into different directory to conform to the new jtreg
naming conventions
 - updated to latest hotspot-gc (applied cleanly, no changes)

@Tao: I added you to the reviewed-by set for this change. I hope this is
okay with you as you apparently reviewed the previous version already.

Ergonomics behavior reference:
http://cr.openjdk.java.net/~tschatzl/8006088/webrev.6/XmsInitialHeapSizeErgo.html

Bugs.sun.com:
http://bugs.sun.com/view_bug.do?bug_id=8006088

JIRA:
https://jbs.oracle.com/bugs/browse/JDK-8006088

Webrev:
http://cr.openjdk.java.net/~tschatzl/8006088/webrev.8/

Testing:
JPRT, manual testing

Thanks,
Thomas