Fix rat ignore

ambari-agent/pom.xml

@@ -646,6 +646,7 @@
           <excludes>
             <exclude>src/examples/*</exclude>
             <exclude>src/test/python/dummy*.txt</exclude>
+            <exclude>src/test/python/ambari_agent/dummy_files/*</exclude>
             <exclude>src/test/python/ambari_agent/dummy*.txt</exclude>
             <exclude>src/main/python/ambari_agent/imports.txt</exclude>
             <exclude>src/main/puppet/modules/stdlib/**</exclude>