RFR: 8298907: nsk JDI tests pass if the debuggee failed to launch [v2]

[Leonid Mesnik]

> Updated run() to return exitCode and make testExitCode non-static to don't use it in run()

Leonid Mesnik has updated the pull request incrementally with one additional commit since the last revision:

  cp updated

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Changes:
  - all: https://git.openjdk.org/jdk/pull/12270/files
  - new: https://git.openjdk.org/jdk/pull/12270/files/93d58bac..a6f35d41

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=12270&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=12270&range=00-01

  Stats: 5 lines in 5 files changed: 0 ins; 0 del; 5 mod
  Patch: https://git.openjdk.org/jdk/pull/12270.diff
  Fetch: git fetch https://git.openjdk.org/jdk pull/12270/head:pull/12270

PR: https://git.openjdk.org/jdk/pull/12270