Description of problem:

In domain mode, the server instances cannot find the keytab if the ApplicationRealm is configured to use kerberos as the server-identity:

<security-realm name="ApplicationRealm"> 
  <server-identities> 
    <kerberos> 
      <keytab principal="remote/imahost.imadomain.net@VM29" path="/path/to/keytab"/> 
    </kerberos> 
  </server-identities> 
  <authentication> 
    <kerberos remove-realm="true"/> 
  </authentication> 
  <authorization> 
    <properties path="application-roles.properties" relative-to="jboss.domain.config.dir"/> 
  </authorization> 
</security-realm>

This results in the following error and the server instances fail to start:

[Server:server-one] 12:46:45,315 ERROR [org.jboss.as.controller.management-operation] (Controller Boot Thread) JBAS014612: Operation ("validate-authentication") failed - address: ([
[Server:server-one]     ("core-service" => "management"),
[Server:server-one]     ("security-realm" => "ApplicationRealm")
[Server:server-one] ]) - failure description: "JBAS021009: Kerberos is enabled for authentication on security realm 'ApplicationRealm' but no Keytab has been added to the server-identity."
[Server:server-one] 12:46:45,319 FATAL [org.jboss.as.server] (Controller Boot Thread) JBAS015957: Server boot has failed in an unrecoverable manner; exiting. See previous messages for details.
[Server:server-one] 12:46:45,342 INFO  [org.jboss.as] (MSC service thread 1-4) JBAS015950: JBoss EAP 6.4.7.GA (AS 7.5.7.Final-redhat-3) stopped in 18ms