[MENFORCER-491] Fix plugin documentation generation

The new maven-plugin-report-plugin should be used.

Author: slawekjaranowski

maven-enforcer-plugin/pom.xml

@@ -162,7 +162,7 @@
     <plugins>
       <plugin>
         <groupId>org.apache.maven.plugins</groupId>
-        <artifactId>maven-plugin-plugin</artifactId>
+        <artifactId>maven-plugin-report-plugin</artifactId>
       </plugin>
     </plugins>
   </reporting>