Exclude the CONTRIBUTING file from the rat check
diff --git a/project/pom.xml b/project/pom.xml
index 8f2a8ac..ac70049 100644
--- a/project/pom.xml
+++ b/project/pom.xml
@@ -162,6 +162,7 @@
             <exclude>**/README.md</exclude>
             <exclude>**/README.txt</exclude>
             <exclude>**/DEPENDENCIES</exclude>
+            <exclude>**/CONTRIBUTING.md</exclude>
 
             <exclude>.git/**</exclude>
             <exclude>**/.gitignore</exclude>