Moved groovy compilation phase from core to parent

Use stock gmaven plugin to achieve this

core/pom.xml

@@ -669,21 +669,6 @@ THE SOFTWARE.
           </archive>
         </configuration>
       </plugin>
-      <plugin>
-        <groupId>org.kohsuke.gmaven</groupId>
-        <artifactId>gmaven-plugin</artifactId>
-        <!-- version specified in grandparent pom -->
-        <executions>
-          <execution>
-            <goals>
-              <goal>generateStubs</goal>
-              <goal>compile</goal>
-              <goal>generateTestStubs</goal>
-              <goal>testCompile</goal>
-            </goals>
-          </execution>
-        </executions>
-      </plugin>
     </plugins>
   </build>
 

pom.xml

@@ -105,24 +105,24 @@ THE SOFTWARE.
 
   <dependencyManagement>
     <dependencies>
-      
+
       <dependency>
         <groupId>org.apache.ant</groupId>
         <artifactId>ant</artifactId>
         <version>1.8.0</version>
-      </dependency>    
-      
+      </dependency>
+
       <dependency>
         <groupId>commons-io</groupId>
         <artifactId>commons-io</artifactId>
         <version>1.4</version>
       </dependency>
-      
+
       <dependency>
         <groupId>junit</groupId>
         <artifactId>junit</artifactId>
         <version>4.8.1</version>
-      </dependency>  
+      </dependency>
 
       <dependency>
         <groupId>commons-httpclient</groupId>
@@ -234,7 +234,7 @@ THE SOFTWARE.
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-install-plugin</artifactId>
           <version>2.3.1</version>
-        </plugin>        
+        </plugin>
         <plugin>
           <groupId>org.apache.maven.plugins</groupId>
           <artifactId>maven-javadoc-plugin</artifactId>
@@ -407,7 +407,7 @@ THE SOFTWARE.
         </plugin>
       </plugins>
     </pluginManagement>
-    
+
     <plugins>
       <plugin>
         <groupId>org.codehaus.mojo</groupId>
@@ -508,6 +508,21 @@ THE SOFTWARE.
           </execution>
         </executions>
       </plugin>-->
+      <plugin>
+        <groupId>org.codehaus.groovy.maven</groupId>
+        <artifactId>gmaven-plugin</artifactId>
+        <version>1.0</version>
+        <executions>
+          <execution>
+            <goals>
+              <goal>generateStubs</goal>
+              <goal>compile</goal>
+              <goal>generateTestStubs</goal>
+              <goal>testCompile</goal>
+            </goals>
+          </execution>
+        </executions>
+      </plugin>
     </plugins>
 
   </build>