HBASE-27714 WALEntryStreamTestBase creates a new HBTU in startCluster…

… method which causes all sub classes are testing default configurations (#5101)

Signed-off-by: Guanghao Zhang <zghao@apache.org>
(cherry picked from commit ce7b1d4)

hbase-server/src/test/java/org/apache/hadoop/hbase/replication/regionserver/WALEntryStreamTestBase.java

@@ -125,7 +125,6 @@ public void preLogRoll(Path oldPath, Path newPath) {
   protected final MultiVersionConcurrencyControl mvcc = new MultiVersionConcurrencyControl();
 
   protected static void startCluster() throws Exception {
-    TEST_UTIL = new HBaseTestingUtility();
     CONF = TEST_UTIL.getConfiguration();
     CONF.setLong("replication.source.sleepforretries", 10);
     TEST_UTIL.startMiniDFSCluster(3);