Add excludes for rat

git-svn-id: https://svn.apache.org/repos/asf/sling/trunk@1676418 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/pom.xml b/pom.xml
index 56d5ee1..59f1888 100644
--- a/pom.xml
+++ b/pom.xml
@@ -120,6 +120,17 @@
                 </configuration>
             </plugin>
             <plugin>
+                <groupId>org.apache.rat</groupId>
+                <artifactId>apache-rat-plugin</artifactId>
+                <configuration>
+                    <excludes>
+                        <exclude>derby.log</exclude>
+                        <exclude>sling/**</exclude>
+                        <exclude>src/main/resources/SLING-CONTENT/libs/test/install.author/*.json</exclude>
+                    </excludes>
+                </configuration>
+            </plugin>
+            <plugin>
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-javadoc-plugin</artifactId>
             </plugin>