Bugfix: Added rat configuration

* It seems that RAT was never executed properly after *.dia
  were inserted into the project's site.


git-svn-id: https://svn.apache.org/repos/asf/creadur/whisker/trunk@1631871 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 46d29a7..ddbe241 100644
--- a/pom.xml
+++ b/pom.xml
@@ -254,6 +254,11 @@
           <groupId>org.apache.rat</groupId>
           <artifactId>apache-rat-plugin</artifactId>
           <version>0.11</version>
+          <configuration>
+            <excludes>
+              <exclude>src/site/resources/*.dia</exclude>
+            </excludes>
+          </configuration>
         </plugin>
         <!-- instrumentalization for cobertura -->
         <plugin>