HADOOP-16163. NPE in setup/teardown of ITestAbfsDelegationTokens.

Contributed by Da Zhou.

Signed-off-by: Steve Loughran <stevel@apache.org>

hadoop-tools/hadoop-azure/pom.xml

@@ -566,6 +566,7 @@
                     <exclude>**/azurebfs/ITestAzureBlobFileSystemE2EScale.java</exclude>
                     <exclude>**/azurebfs/ITestAbfsReadWriteAndSeek.java</exclude>
                     <exclude>**/azurebfs/ITestAzureBlobFileSystemListStatus.java</exclude>
+                    <exclude>**/azurebfs/extensions/ITestAbfsDelegationTokens.java</exclude>
                   </excludes>
 
                 </configuration>
@@ -604,6 +605,7 @@
                     <include>**/azurebfs/ITestAzureBlobFileSystemE2EScale.java</include>
                     <include>**/azurebfs/ITestAbfsReadWriteAndSeek.java</include>
                     <include>**/azurebfs/ITestAzureBlobFileSystemListStatus.java</include>
+                    <include>**/azurebfs/extensions/ITestAbfsDelegationTokens.java</include>
                   </includes>
                 </configuration>
               </execution>