[crac] RFR: [TEST] check if some j.l.* methods time out on restore immediately

[Alexander Stepanov]

add a test to check if Thread.join(timeout), Thread.sleep(timeout) and Object.wait(timeout) will be completed on restore immediately if their end time fell on the CRaC pause period

checked on Ubuntu 20.04 Linux (x86-64), passed

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Commit messages:
 - update copyright
 - add JoinSleepWaitOnCRPauseTest

Changes: https://git.openjdk.java.net/crac/pull/15/files
 Webrev: https://webrevs.openjdk.java.net/?repo=crac&pr=15&range=00
  Stats: 202 lines in 1 file changed: 202 ins; 0 del; 0 mod
  Patch: https://git.openjdk.java.net/crac/pull/15.diff
  Fetch: git fetch https://git.openjdk.java.net/crac pull/15/head:pull/15

PR: https://git.openjdk.java.net/crac/pull/15