@BeforeClass
  public static void setUp() throws Exception {
    UTIL.getConfiguration().set(WALFactory.WAL_PROVIDER, WALFactory.Providers.multiwal.name());
    UTIL.startMiniCluster(1);
  }
Testcase for HBASE-21843. Used to confirm that we use the correct name for meta wal file when
using {@link RegionGroupingProvider}.
hbase-server/src/test/java/org/apache/hadoop/hbase/wal/TestWrongMetaWALFileName.java