@Test
  public void canStillRebalanceAfterAlteringEntryTimeToLive() {
    VM vm0 = VM.getVM(0);
    IntStream.range(0, NUM_VMS).forEach(this::createRegionsOnVM);

    vm0.invoke(this::createAllBuckets);

    // Alter the region
    vm0.invoke(this::alterRegion);

    // Move data.
    vm0.invoke(this::moveBuckets);

    // Check redundancy of all regions
    vm0.invoke(this::checkRedundancyLevel);
  }
This is a regression test for GEODE-6767 that we can still rebalance after altering certain
partitioned region attributes.

Altering the region attributes changes metadata in the __PR region. If that metadata is
corrupted, rebalance may end up reducing redundancy due to the fact that
isColocationComplete=false
in the metadata.
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/partitioned/PartitionedRegionAttributesMutatorDUnitTest.java