more efficient maven-plugin-plugin configuration

git-svn-id: https://svn.apache.org/repos/asf/maven/sandbox/trunk@1639230 13f79535-47bb-0310-9956-ffa450edef68
diff --git a/dist-tools/dist-tool-plugin/pom.xml b/dist-tools/dist-tool-plugin/pom.xml
index 59badc8..a963f1d 100644
--- a/dist-tools/dist-tool-plugin/pom.xml
+++ b/dist-tools/dist-tool-plugin/pom.xml
@@ -168,22 +168,19 @@
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
         <artifactId>maven-plugin-plugin</artifactId>
-        <configuration>
-          <!-- see http://jira.codehaus.org/browse/MNG-5346 -->
-          <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
-        </configuration>
         <executions>
           <execution>
-            <id>mojo-descriptor</id>
-            <goals>
-              <goal>descriptor</goal>
-            </goals>
+            <id>default-descriptor</id>
+            <phase>process-classes</phase>
           </execution>
           <execution>
-            <id>help-goal</id>
+            <id>generated-helpmojo</id>
             <goals>
               <goal>helpmojo</goal>
             </goals>
+            <configuration><!-- TODO: remove when upgrading plugin-tools to 3.4: see MPLUGIN-238 -->
+              <skipErrorNoDescriptorsFound>true</skipErrorNoDescriptorsFound>
+            </configuration>
           </execution>
         </executions>
       </plugin>