gistfile1.txt

<build>
...
<pluginManagement>
...
<plugins>
...

<plugin>
  <artifactId>maven-enforcer-plugin</artifactId>
  <version>1.0</version>
  <executions>    
    <execution>
      <id>enforce</id>      
      <goals>
        <goal>enforce</goal>
      </goals>
      <configuration>
        <rules>
          <DependencyConvergence />
        </rules>
      </configuration>
    </execution>
  </executions>
</plugin>