[crac] RFR: 8347055: [CRaC] Remote JMX support

[Timofei Pushkin]

Makes remote JMX support CRaC: both closing/reopening the related sockets on C/R and setting up remote JMX if it was not configured before checkpoint.

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Commit messages:
 - Fix whitespace errors
 - Fix typo in CRaC's error logging
 - Support enabling JMX when it was not up before checkpoint
 - Test fail on Windows with timeout
 - Implement CracProcess.destroyForcibly()
 - Stop JMX RMI before checkpoint & restart after restore

Changes: https://git.openjdk.org/crac/pull/171/files
  Webrev: https://webrevs.openjdk.org/?repo=crac&pr=171&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8347055
  Stats: 295 lines in 7 files changed: 275 ins; 8 del; 12 mod
  Patch: https://git.openjdk.org/crac/pull/171.diff
  Fetch: git fetch https://git.openjdk.org/crac.git pull/171/head:pull/171

PR: https://git.openjdk.org/crac/pull/171