@Before
  public void before() {
    TEST_UTIL.getConfiguration().set(WALFactory.WAL_PROVIDER, walProvider);
  }
Ensure configuration changes are having an effect on WAL. There is a lot of reflection around WAL
setup; could be skipping Configuration changes.
hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/wal/TestWALConfiguration.java