bumped up the compiler plugin

git-svn-id: https://svn.apache.org/repos/asf/directory/project/trunk@1394963 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 2906fbc..864cfef 100644
--- a/pom.xml
+++ b/pom.xml
@@ -471,7 +471,7 @@
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-compiler-plugin</artifactId>
-          <version>2.3.2</version>
+          <version>2.5.1</version>
           <configuration>
             <source>1.5</source>
             <target>1.5</target>