RFR: 8316446: 4 sun/management/jdp tests ignore VM flags

[Leonid Mesnik]

The launcher class is fixed. 
Tested by tier1 and running test with different VM flags

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Commit messages:
 - 8316446

Changes: https://git.openjdk.org/jdk/pull/16079/files
 Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=16079&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8316446
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/jdk/pull/16079.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/16079/head:pull/16079

PR: https://git.openjdk.org/jdk/pull/16079