RFR: 8310075 Revert accidental change to jcheck configuration for shenandoah project

[William Kemper]

This bit of the configuration was clobbered with https://github.com/openjdk/shenandoah/pull/285.

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Commit messages:
 - Restore jcheck configuration and increment project version to 22

Changes: https://git.openjdk.org/shenandoah/pull/288/files
 Webrev: https://webrevs.openjdk.org/?repo=shenandoah&pr=288&range=00
  Issue: https://bugs.openjdk.org/browse/JDK-8310075
  Stats: 2 lines in 1 file changed: 0 ins; 0 del; 2 mod
  Patch: https://git.openjdk.org/shenandoah/pull/288.diff
  Fetch: git fetch https://git.openjdk.org/shenandoah.git pull/288/head:pull/288

PR: https://git.openjdk.org/shenandoah/pull/288