Back off commons-io version to 2.15.1 because of convergence issue with AntiSamy 1.7.5.

Author: kwwall

pom.xml

@@ -286,7 +286,7 @@
             -->
             <groupId>commons-io</groupId>
             <artifactId>commons-io</artifactId>
-            <version>2.16.1</version>
+            <version>2.15.1</version>
         </dependency>
 
         <!-- SpotBugs dependencies -->