RFR: 8313655: sun/tools/jhsdb/HeapDumpTestWithActiveProcess.java frequently fails with SerialGC

[Ramkumar Sunderbabu]

VM argument UseSerialGC was not allowed while launching the debuggee process due to classloader related issue. During the effort to improve the test's handling of the issue, it was observed that SerialGC doesn't cause any issue any more. This could possibly due to improved handling of ClassLoaderData or SerialGC.
After extensively testing the argument in various platforms and for many iterations, it was decided to allow the argument here on.

Testing: Tiers1,2,3 and other ties where the test runs.

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Commit messages:
 - 8313655: sun/tools/jhsdb/HeapDumpTestWithActiveProcess.java frequently fails with SerialGC

Changes: https://git.openjdk.org/jdk/pull/26690/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=26690&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8313655
  Stats: 6 lines in 1 file changed: 0 ins; 5 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/26690.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/26690/head:pull/26690

PR: https://git.openjdk.org/jdk/pull/26690