HDFS-16409. Fix typo: testHasExeceptionsReturnsCorrectValue -> testHasExceptionsReturnsCorrectValue (#3835)

Reviewed-by: Fei Hui <feihui.ustc@gmail.com>
Signed-off-by: Akira Ajisaka <aajisaka@apache.org>

Author: hotcodemacha

hadoop-hdfs-project/hadoop-hdfs/src/test/java/org/apache/hadoop/hdfs/server/datanode/fsdataset/impl/TestAddBlockPoolException.java

@@ -34,7 +34,7 @@
 public class TestAddBlockPoolException {
 
   @Test
-  public void testHasExeceptionsReturnsCorrectValue() {
+  public void testHasExceptionsReturnsCorrectValue() {
     AddBlockPoolException e = new AddBlockPoolException();
     assertFalse(e.hasExceptions());