[crac] RFR: Convert CRaC tests from shell scripts to Java

[Radim Vansa]

Right now this is a draft as it builds on top of https://github.com/openjdk/crac/pull/47

Please see `CracTest` javadoc for detailed info.

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Commit messages:
 - Merge remote-tracking branch 'origin/crac' into test-crac-java
 - Remove test name from the @run JTreg tag
 - Use default main and args from CracTest
 - Merge remote-tracking branch 'origin/crac' into test-crac-java
 - Add docker to CracBuilder
 - Rename enum for `simengine` to SIMULATE
 - Convert CRaC tests from shell scripts to Java
 - Remove somebody's forgotten overrides
 - Fix failing CRaC tests

Changes: https://git.openjdk.org/crac/pull/50/files
 Webrev: https://webrevs.openjdk.org/?repo=crac&pr=50&range=00
  Stats: 3582 lines in 54 files changed: 1683 ins; 1680 del; 219 mod
  Patch: https://git.openjdk.org/crac/pull/50.diff
  Fetch: git fetch https://git.openjdk.org/crac pull/50/head:pull/50

PR: https://git.openjdk.org/crac/pull/50