RFR: 8319648: java/lang/SecurityManager tests ignore vm flags [v2]

[Matthew Donovan]

> In this PR I updated the tests to use the newer ProcessTools.createTestJavaProcessBuilder methods to pass VM options to child processes.

Matthew Donovan has updated the pull request incrementally with one additional commit since the last revision:

  removed unused import statement

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Changes:
  - all: https://git.openjdk.org/jdk/pull/17878/files
  - new: https://git.openjdk.org/jdk/pull/17878/files/458ac07a..5e5261bf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=17878&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=17878&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 1 del; 0 mod
  Patch: https://git.openjdk.org/jdk/pull/17878.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/17878/head:pull/17878

PR: https://git.openjdk.org/jdk/pull/17878