removing duplicate and upgrading rat

git-svn-id: https://svn.apache.org/repos/asf/bval/trunk@1728271 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index ab4c7a2..a7d130b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -478,7 +478,7 @@
                 <plugin>
                     <groupId>org.apache.rat</groupId>
                     <artifactId>apache-rat-plugin</artifactId>
-                    <version>0.10</version>
+                    <version>0.11</version>
                     <executions>
                         <execution>
                             <phase>verify</phase>
@@ -509,7 +509,6 @@
                             <exclude>**/*.iml</exclude>
                             <exclude>**/*.ipr</exclude>
                             <exclude>**/*.iws</exclude>
-                            <exclude>.idea</exclude>
                             <exclude>**/META-INF/services/*</exclude> <!-- depending service loader it can fail if a comment is added -->
                         </excludes>
                     </configuration>