Description of problem: The changes for EAP6-191 are brining the bulk of the security realm implementation in-line with upstream - this is good as it simplifies future ports from WildFly to EAP - however there are a couple of bug fixes implemented upstream only that should be backported, this is one of them. Runtime updates to attributes defined on an outbound LDAP connection are only performed on a standalone server, they should also be performed on a host controller or admin only server.
Verified for EAP 6.4.0 DR1.1