upgrade parent to v25

git-svn-id: https://svn.apache.org/repos/asf/commons/proper/proxy/branches/version-2.0-work@1347773 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 43f6e26..4ede874 100644
--- a/pom.xml
+++ b/pom.xml
@@ -32,7 +32,7 @@
     <parent>
         <groupId>org.apache.commons</groupId>
         <artifactId>commons-parent</artifactId>
-        <version>17</version>
+        <version>25</version>
     </parent>
     <artifactId>commons-proxy2-parent</artifactId>
     <version>2.0-SNAPSHOT</version>