Refactor ProcessBuilder and ProcessHandle tests to use Junit instead of TestNG. Remove old main testng driver stubs that allowed tests to be run from the command line.
------------- Commit messages: - JDK-8379437: Refactor ProcessBuilder and ProcessHandle tests to JUnit Changes: https://git.openjdk.org/jdk/pull/30128/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=30128&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8379437 Stats: 293 lines in 7 files changed: 15 ins; 86 del; 192 mod Patch: https://git.openjdk.org/jdk/pull/30128.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/30128/head:pull/30128 PR: https://git.openjdk.org/jdk/pull/30128
