RFR: 8266460: java.io tests fail on null stream with upgraded jtreg/TestNG

[Lance Andersen]

Hi all,

This fix addresses a change in TestNG behavior for the Before/AfterGroups annotations that was introduced  via  https://github.com/cbeust/testng/pull/2167.   The tests have been verified against the latest TestNG release and continue to run with the current TestNG release used by jtreg

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Commit messages:
 - remove trailing space
 - Updates for TestNG 7.4

Changes: https://git.openjdk.java.net/jdk/pull/3866/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk&pr=3866&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8266460
  Stats: 122 lines in 4 files changed: 12 ins; 24 del; 86 mod
  Patch: https://git.openjdk.java.net/jdk/pull/3866.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk pull/3866/head:pull/3866

PR: https://git.openjdk.java.net/jdk/pull/3866