In current webservice elytron integration, the security domain specified to secure webservice endpoint must be the same name with elytron security domain name .
Reference https://developer.jboss.org/message/977744#977744

This configuration in undertow makes webservices deployment unaware of the desired "new-name" security domain

<application-security-domains>
    <application-security-domain name="new-name" security-domain="original-name"/>
</application-security-domains>

while this causes "original-name" to be visible just fine

<application-security-domains>
    <application-security-domain name="original-name" security-domain="original-name"/>
</application-security-domains>

asoldano or jimma could provide more details here about what exactly should be in documentation.