added excludes for .repository/ directory that may be created by CI

git-svn-id: https://svn.apache.org/repos/asf/maven/pom/trunk@1807672 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/maven/pom.xml b/maven/pom.xml
index 00e6d2a..7c53216 100644
--- a/maven/pom.xml
+++ b/maven/pom.xml
@@ -1085,6 +1085,11 @@
       <plugin>
         <groupId>org.apache.rat</groupId>
         <artifactId>apache-rat-plugin</artifactId>
+        <configuration>
+          <excludes combine.children="append">
+            <exclude>.repository/**</exclude><!-- for CI -->
+          </excludes>
+        </configuration>
         <executions>
           <execution>
             <id>rat-check</id>