Zdar, ak by nepomohlo toto:
<build>
    [...]
    <plugins>
      <plugin>
        <groupId>org.apache.maven.plugins</groupId>
        <artifactId>maven-ejb-plugin</artifactId>
        <version>2.2.1</version>
        <configuration>
          <!-- this is false by default -->
          <generateClient>true</generateClient>
        </configuration>
      </plugin>
    </plugins>
    [...]
  </build>
, tak potom by so to videl na bruteforce - plugin dependency:copy-dependencies alebo assembly.. pripadne mozno nahlad do zdrojakov ejb plugina - ako to bolo zamyslane.