Updating rat configuration and profile documentation

git-svn-id: https://svn.apache.org/repos/asf/incubator/nuvem/trunk@1299550 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index a08ca78..316e71b 100644
--- a/pom.xml
+++ b/pom.xml
@@ -228,7 +228,8 @@
         <!-- ====================================================================== -->
         <!-- Profile to run Apache License check plugin                             -->
         <!-- usage:                                                                 -->
-        <!--    mvn rat:check                                                       -->
+        <!--    mvn -Prat (works for nuvem)                                         -->
+        <!--    mvn rat:check                                                       -->        
         <!-- ====================================================================== -->
         <profile>
             <id>rat</id>
@@ -257,6 +258,7 @@
                                 <exclude>**/NOTICE</exclude>
 
                                 <!-- git specific files -->
+                                <exclude>**/.git</exclude>
                                 <exclude>**/.git/**/*</exclude>
                                 <exclude>.gitignore</exclude>