Add Gradle modules to reactor build

pom.xml

@@ -16,7 +16,7 @@
         <module>spring-rewrite-commons-docs</module>
         <module>spring-rewrite-commons-examples</module>
         <module>spring-rewrite-commons-starters</module>
-        <!--        <module>spring-rewrite-commons-gradle</module>-->
+        <module>spring-rewrite-commons-gradle</module>
     </modules>
 
     <organization>

spring-rewrite-commons-gradle/pom.xml

@@ -7,6 +7,7 @@
         <groupId>org.springframework.rewrite</groupId>
         <artifactId>spring-rewrite-commons</artifactId>
         <version>0.1.0-SNAPSHOT</version>
+        <relativePath>../pom.xml</relativePath>
     </parent>
 
     <artifactId>spring-rewrite-commons-gradle</artifactId>