RFR: 8333200: Test containers/docker/TestPids.java fails Limit value -1 is not accepted as unlimited

[SendaoYan]

Hi all,
  The testcase `containers/docker/TestPids.java` seems to be failed after [JDK-8302744](https://bugs.openjdk.org/browse/JDK-8302744), I am not quiet sure.
  I think `max` or `-1` both acceptable as unlimited pids value.
  The change has been verified, only change the testcase, no risk.

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Commit messages:
 - 8333200: Test containers/docker/TestPids.java fails Limit value -1 is not accepted as unlimited

Changes: https://git.openjdk.org/jdk/pull/19460/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=19460&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8333200
  Stats: 6 lines in 1 file changed: 2 ins; 1 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/19460.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/19460/head:pull/19460

PR: https://git.openjdk.org/jdk/pull/19460