Simples Assim

You can replace it, but not append to it.

<plugin>
  <groupId>org.apache.felix</groupId>
  <artifactId>maven-bundle-plugin</artifactId>
  <version>2.3.5</version>
  <extensions>true</extensions>
  <configuration>
    <instructions>
      <Import-Package>br.eti.fernandoribeiro</Import-Package>
    </instructions>
  </configuration>
</plugin>

Thanks to Igor for the original post.