[crac] RFR: Fix failing CRaC tests [v2]

[Radim Vansa]

> Before https://github.com/openjdk/crac/pull/16 the arguments for restored process were ignored; tests were written with this in mind and current behaviour breaks them.
> 
> In addition I've added missing `-XX:+UnlockDiagnosticVMOptions` flag and fixed the `recursiveCheckpoint` test runner which got stuck as with `pauseengine` the checkpointed process does not terminate.

Radim Vansa has updated the pull request incrementally with one additional commit since the last revision:

  Remove somebody's forgotten overrides

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

Changes:
  - all: https://git.openjdk.org/crac/pull/47/files
  - new: https://git.openjdk.org/crac/pull/47/files/a69eb665..3b9598bf

Webrevs:
 - full: https://webrevs.openjdk.org/?repo=crac&pr=47&range=01
 - incr: https://webrevs.openjdk.org/?repo=crac&pr=47&range=00-01

  Stats: 5 lines in 1 file changed: 0 ins; 3 del; 2 mod
  Patch: https://git.openjdk.org/crac/pull/47.diff
  Fetch: git fetch https://git.openjdk.org/crac pull/47/head:pull/47

PR: https://git.openjdk.org/crac/pull/47