'inherited' flag of report sets ignored.

<reporting>
  <plugins>
    <plugin>
      <groupId>org.apache.maven.plugins</groupId>
      <artifactId>maven-javadoc-plugin</artifactId>
      <reportSets>
        <reportSet>
          <id>javadoc</id>
          <reports>
            <report>javadoc</report>
            <report>test-javadoc</report>
          </reports>
        </reportSet>
        <reportSet>
          <id>aggregate</id>
          <inherited>false</inherited>
          <reports>
            <report>aggregate</report>
            <report>test-aggregate</report>
          </reports>
        </reportSet>
      </reportSets>
    </plugin>
  </plugins>
</reporting>