RFR: 8274506: TestPids.java and TestPidsLimit.java fail with podman run as root

[Severin Gehwolf]

Please review this test fix to work around a podman issue[1]. `podman` expects for the "unlimited" option of `--pids-limit` to be `0` whereas `docker` wants `-1`. See the JBS bug for details. Thoughts?

Testing: hotspot/jdk container tests with docker and podman. Two pids tests used to fail and pass with the patch.

[1] https://github.com/containers/podman/issues/11782

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Commit messages:
 - 8274506: TestPids.java and TestPidsLimit.java fail with podman run as root

Changes: https://git.openjdk.java.net/jdk/pull/5750/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=5750&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8274506
  Stats: 12 lines in 2 files changed: 10 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk/pull/5750.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/5750/head:pull/5750

PR: https://git.openjdk.java.net/jdk/pull/5750