[jdk17] RFR: 8269929: (test) Add diagnostic info to ProceessBuilder/Basic.java for unexpected output

[Roger Riggs]

The test java/lang/ProcessBuilder/Basic.java continues to fail intermittently with unexpected output from the VM.
It appears that destroying the process causes a vm thread to fail to be started.
Extend the delay between starting the child and destroying it.
Add diagnostics to be specific about which case failed.
Incidentally, suppress compiler warnings about SecurityManager use.

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Commit messages:
 - Extend delay before destorying child to allow more vm startup to complete.

Changes: https://git.openjdk.java.net/jdk17/pull/228/files
 Webrev: https://webrevs.openjdk.java.net/?repo=jdk17&pr=228&range=00
  Issue: https://bugs.openjdk.java.net/browse/JDK-8269929
  Stats: 7 lines in 1 file changed: 5 ins; 0 del; 2 mod
  Patch: https://git.openjdk.java.net/jdk17/pull/228.diff
  Fetch: git fetch https://git.openjdk.java.net/jdk17 pull/228/head:pull/228

PR: https://git.openjdk.java.net/jdk17/pull/228