RFR (S): 8067676: Add applicable closed gc jtreg tests to run in JPRT

[Bengt Rutisson]

Hi all,

Could I have a couple of reviews for this change that prepares for 
closed JTreg tests to be run in JPRT?

Root repo changes:
http://cr.openjdk.java.net/~brutisso/8067676/root-repo-webrev.00/

HotSpot repo changes:
http://cr.openjdk.java.net/~brutisso/8067676/hotspot-webrev.00/

Thanks,
Bengt