RFR: 8266165: TestNoWarningLoopStripMiningIterSet is runnable only on VM w/ G1, Shenandoah, Z and Epsilon

[Igor Ignatyev]

Hi all,

could you please review the patch which splits `TestNoWarningLoopStripMiningIterSet` test into several "subtests", one for each GCs?

from JBS:
> `TestNoWarningLoopStripMiningIterSet` test uses `@requires vm.gc.G1 & vm.gc.Shenandoah & vm.gc.Z & vm.gc.Epsilon` to make sure all GCs in its loop are available. this exlcudes this test from execution on VMs which don't have at least one of the listed GCs.

Thanks,
-- Igor

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Commit messages:
 - split the test

Changes: https://git.openjdk.java.net/jdk/pull/3767/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3767&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266165
  Stats: 43 lines in 1 file changed: 34 ins; 1 del; 8 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3767.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3767/head:pull/3767

PR: https://git.openjdk.java.net/jdk/pull/3767