Is it possible to change log layout from EAP6? (HTMLLayout)

Issue

During migration from EAP 5 to EAP 6, I tried to apply own log4j configuration to EAP default logging handler.

How to use HTMLLayout on EAP logging module?

<appender name="performHTMLFileAppender" class="org.apache.log4j.FileAppender">
        <param name="File" value="${jboss.home.dir}/../log/SAML/performance.html"/>
        <param name="Append" value="false"/>
        <layout class="org.apache.log4j.HTMLLayout"></layout>
    </appender>