RFR: 8359402: TesCloseDescriptors.java should throw SkippedException when there is no lsof/sctp

[SendaoYan]

Hi all,

Test com/sun/nio/sctp/SctpChannel/CloseDescriptors.java should throw jtreg.SkippedException when there is no lsof command or there is no SCTP in test machine.
Before this PR, this test report Execution successful when there is no SCTP.


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TEST: com/sun/nio/sctp/SctpChannel/CloseDescriptors.java
TEST RESULT: Passed. Execution successful
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After this PR, it will report `jtreg.SkippedException` when there is no SCTP


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TEST: com/sun/nio/sctp/SctpChannel/CloseDescriptors.java
TEST RESULT: Passed. Skipped: jtreg.SkippedException: SCTP protocol is not supported
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Change has been verified locally, test-fix only, no risk.

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Commit messages:
 - 8359402: TesCloseDescriptors.java should throw SkippedException when there is no lsof/sctp

Changes: https://git.openjdk.org/jdk/pull/25790/files
  Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=25790&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8359402
  Stats: 9 lines in 1 file changed: 2 ins; 4 del; 3 mod
  Patch: https://git.openjdk.org/jdk/pull/25790.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/25790/head:pull/25790

PR: https://git.openjdk.org/jdk/pull/25790