How can I deploy my MDB with xml descriptors in a WAR on JBoss EAP 6?

Issue

I have a jboss-ejb3.xml and ejb-jar.xml below.

Please note that they are under WEB-INF/lib/SOMESUBMODULE.jar/META-INF/

It all looks by-the-book, but JBoss does not pick the configuration up.

Anything I am missing here?

jboss-ejb3.xml

<?xml version="1.0" encoding="UTF-8"?>
<jboss xmlns="http://www.jboss.com/xml/ns/javaee"
       xmlns:jee="http://java.sun.com/xml/ns/javaee"
       xmlns:mdb="urn:resource-adapter-binding"
       xmlns:security="urn:security">

  <jee:assembly-descriptor>

    <mdb:resource-adapter-binding>
      <jee:ejb-name>MyMessageBean</jee:ejb-name>
      <mdb:resource-adapter-name>generic-ra.rar</mdb:resource-adapter-name>
    </mdb:resource-adapter-binding>

  </jee:assembly-descriptor>

</jboss>

ejb-jar.xml

<ejb-jar>

  <enterprise-beans>

    <message-driven>
      <ejb-name>MyMessageBean</ejb-name>
      <ejb-class>test.MyMessageBean</ejb-class>
      <transaction-type>Container</transaction-type>
      <message-destination-type>javax.jms.Queue</message-destination-type>
      <activation-config>
        <activation-config-property>
          <activation-config-property-name>destinationType</activation-config-property-name>
          <activation-config-property-value>javax.jms.Queue</activation-config-property-value>
        </activation-config-property>
        <activation-config-property>
          <activation-config-property-name>destinationJndiName</activation-config-property-name>
          <activation-config-property-value>MY_QUEUE_NAME
          </activation-config-property-value>
        </activation-config-property>
        <activation-config-property>
          <activation-config-property-name>connectionFactoryJndiName</activation-config-property-name>
          <activation-config-property-value>XAQueueConnectionFactory</activation-config-property-value>
        </activation-config-property>
      </activation-config>
    </message-driven>

  </enterprise-beans>
</ejb-jar>