RFR(XS): 8229210: [TESTBUG] Move gc stress tests from JFR directory tree to gc/stress

[Erik Gahlin]

Looks good!

Erik
> Please review this change that simply moves GC+JFR stress tests from 
> test/jdk/jdk/jfr/event/gc/detailed/TestStress*
> to test/hotspot/jtreg/gc/stress/jfr/
>
> This change was originated by JFR team, and later informally discussed 
> with GC team members. The goal is to remove
> heavy time-consuming GC event stress tests from JFR hierarchy to 
> GC/stress, where they better fit.
>
>     JBS: https://bugs.openjdk.java.net/browse/JDK-8229210
>     Webrev: http://cr.openjdk.java.net/~mseledtsov/8229210.00/
>        Just a simple move, no changes to the tests:
>        hg mv test/jdk/jdk/jfr/event/gc/detailed/TestStress* 
> test/hotspot/jtreg/gc/stress/jfr/
>
>     Testing:
>         1. Sanity: Ran test/hotspot/jtreg/gc/stress/jfr/ - PASS
>         2. Sanity: running jdk_jfr - in progress
>
>
> Thank you,
> Misha
>