add rat plugin to mvn-defaults module

mvn-defaults/pom.xml

@@ -1,3 +1,22 @@
+<!--
+  ~ /*
+  ~  *    Copyright (c) 2022 nosqlbench
+  ~  *
+  ~  *    Licensed under the Apache License, Version 2.0 (the "License");
+  ~  *    you may not use this file except in compliance with the License.
+  ~  *    You may obtain a copy of the License at
+  ~  *
+  ~  *        http://www.apache.org/licenses/LICENSE-2.0
+  ~  *
+  ~  *    Unless required by applicable law or agreed to in writing, software
+  ~  *    distributed under the License is distributed on an "AS IS" BASIS,
+  ~  *    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+  ~  *    See the License for the specific language governing permissions and
+  ~  *    limitations under the License.
+  ~  */
+  ~
+  -->
+
 <project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
     <modelVersion>4.0.0</modelVersion>
 
@@ -554,6 +573,27 @@
                 <groupId>org.apache.maven.plugins</groupId>
                 <artifactId>maven-gpg-plugin</artifactId>
             </plugin>
+
+            <plugin>
+                <groupId>org.apache.rat</groupId>
+                <artifactId>apache-rat-plugin</artifactId>
+                <version>0.13</version>
+                <executions>
+                    <execution>
+                        <phase>verify</phase>
+                        <goals>
+                            <goal>check</goal>
+                        </goals>
+                    </execution>
+                </executions>
+                <configuration>
+                    <includes>
+                        <include>**/*.java</include>
+                    </includes>
+                    <addLicenseHeaders>true</addLicenseHeaders>
+                </configuration>
+            </plugin>
+
         </plugins>
 
         <pluginManagement>