RFR(s): 8044673: Create jtreg groups to list GC specific tests

[Dmitry Fazunenko]

Hello,

This fix introduces new jtreg groups to allow not running tests which 
could conflict because of GC.
Please note, this solution is temporary for 2-3 months, unless jtreg 
starts support the @requires tag
(CODETOOLS-7900307) <https://bugs.openjdk.java.net/browse/CODETOOLS-7900307>

The change itself doesn't affect anything, it just allows to run group 
of tests which doesn't require a specific gc.

Bug: https://bugs.openjdk.java.net/browse/JDK-8044673
Webrev: http://cr.openjdk.java.net/~iignatyev/dfazunenko/8044673/webrev.00/

Testing:
I ran all 4 ":applicable_XXXgc" groups with the corresponding GC and saw 
only known issues not related to the conflict of flags.

Thanks,
Dima