private boolean isCust1LocalSingleBucket(PartitionedRegion pr, CustId cust1) {
    List<Integer> localPrimaryBucketList = pr.getLocalPrimaryBucketsListTestOnly();
    return localPrimaryBucketList.size() == 1;
  }
This method executes a transaction with operation on a key in a moved bucket, and expects
transaction to fail with TransactionDataRebalancedException.

@param op which entry op to be executed
@param bucketRedundancy redundancy for the colocated PRs
geode-core/src/distributedTest/java/org/apache/geode/internal/cache/execute/PRTransactionDUnitTest.java