HADOOP-18043. Use mina-core 2.0.22 to fix LDAP unit test failures (#3792)

Reviewed-by: Ayush Saxena <ayushsaxena@apache.org>

hadoop-project/pom.xml

@@ -1015,7 +1015,7 @@
       <dependency>
         <groupId>org.apache.mina</groupId>
         <artifactId>mina-core</artifactId>
-        <version>2.1.5</version>
+        <version>2.0.22</version>
       </dependency>
       <dependency>
         <groupId>org.apache.sshd</groupId>