[jdk17] RFR: 8268566: java/foreign/TestResourceScope.java timed out

[Maurizio Cimadamore]

This patch contains another minor tweak to TestResourceScope as we have seen this test timing out at least once (on arm64).

I realized that some of the logic recently introduced in the test could lead to the test waiting forever: for instance, if all threads are executed right away before the main thread gets a chance to do anything, we'd be in a state where the lock count is zero, and no other thread will update it. I've removed the while loop - as that's not essential to make sure that the test works (what we want is to trigger a close operation that is concurrent with respect some acquire/release).

I've also lowered the number of threads - which was using 10K - that was good for stress testing, but it's not a good number in more realistic conditions.

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Commit messages:
 - * Remove wait from test

Changes: https://git.openjdk.java.net/jdk17/pull/45/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=45&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8268566
  Stats: 5 lines in 1 file changed: 0 ins; 4 del; 1 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/45.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/45/head:pull/45

PR: https://git.openjdk.java.net/jdk17/pull/45