public void setCacheInVMs(VM... vms) {
    for (VM vm : vms) {
      vm.invoke(this::getAvailableCacheElseCreateCache);
    }
  }
This test is similar to {@link ConcurrentIndexUpdateWithoutWLDUnitTest} except that it sets
system property gemfire.index.INPLACE_OBJECT_MODIFICATION to false so no reverse map is used for
{@link CompactRangeIndex}.

During validation all region operations are paused for a while. Validation happens multiple time
during one test run on a fixed time interval.
geode-core/src/distributedTest/java/org/apache/geode/cache/query/internal/index/ConcurrentIndexUpdateWithInplaceObjectModFalseDUnitTest.java