See https://community.jboss.org/message/766856#766856.

In summary need to add

<dependencies>
<module name="org.apache.log4j"/>
<module name="javax.api"/>
</dependencies>

to modules/org/freemarker/main/module.xml

and

<dependencies>
<module name="javax.api/>
</dependencies>

to modules/com/thoughtworks/xstream/main/module.xml