excluding it here apparently wins over our explicit including it later

git-svn-id: https://hudson.dev.java.net/svn/hudson/trunk/hudson/main@5437 71c3de6d-444a-0410-be80-ed276b4c234a

core/pom.xml

@@ -502,10 +502,10 @@
           <groupId>xstream</groupId>
           <artifactId>xstream</artifactId>
         </exclusion>
-        <exclusion>
+        <!--exclusion>
           <groupId>xpp3</groupId>
           <artifactId>xpp3</artifactId>
-        </exclusion>
+        </exclusioni-->
         <exclusion>
           <groupId>com.tonicsystems</groupId>
           <artifactId>jarjar</artifactId>