HADOOP-17516. Upgrade ant to 1.10.9. (#2683)

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

hadoop-project/pom.xml

@@ -1231,7 +1231,7 @@
       <dependency>
         <groupId>org.apache.ant</groupId>
         <artifactId>ant</artifactId>
-        <version>1.8.1</version>
+        <version>1.10.9</version>
       </dependency>
       <dependency>
         <groupId>com.google.re2j</groupId>