RFR: 8310143: RandomCommandsTest fails due to unexpected VM exit code after JDK-8282797 [v2]

[Tobias Hartmann]

> The fix for [JDK-8282797](https://bugs.openjdk.org/browse/JDK-8282797) missed that randomly generated Compile Commands can be invalid. I verified with the corresponding seeds that all occurrences of this intermittent failure are now fixed. I also removed `Executor::isValid` because it's unused.
> 
> Thanks,
> Tobias

Tobias Hartmann has updated the pull request incrementally with one additional commit since the last revision:

  Missed another usage of Executor constructor

-------------

Changes:
  - all: https://git.openjdk.org/jdk/pull/14538/files
  - new: https://git.openjdk.org/jdk/pull/14538/files/4d24727f..f477f9e2

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=jdk&pr=14538&range=01
 - incr: https://webrevs.openjdk.org/?repo=jdk&pr=14538&range=00-01

  Stats: 1 line in 1 file changed: 0 ins; 0 del; 1 mod
  Patch: https://git.openjdk.org/jdk/pull/14538.diff
  Fetch: git fetch https://git.openjdk.org/jdk.git pull/14538/head:pull/14538

PR: https://git.openjdk.org/jdk/pull/14538