RFR: 8160088: update hotspot tests depending on GC to use @requires vm.gc.X

[Igor Ignatyev]

> On Jun 22, 2016, at 9:06 PM, Dmitry Fazunenko <dmitry.fazunenko at oracle.com> wrote:
> 
> Hello,
> 
> I'm looking for Reviewers for relatively simple fix which affects 59 tests.
>  https://bugs.openjdk.java.net/browse/JDK-8160088
>  http://cr.openjdk.java.net/~dfazunen/8160088/webrev.00/

Looks good to me.

Thanks,
— Igor